0. Goal, prove a DWK Kobold is a TD.
1. No text says DWK Kobold is a TD or that you can qualify to be another Race or Monster.
This sets things up so a Kobold can even try. So the entire thing starts off using house rules and pretenses, lovely start of things eh?
2A. MM1, original source of TD.
One sentence is quoted in a for argument. "TDs gain more abilities", DWK gain +3 to mental scores without penalties, it counts right?
Except, grammatically it is incorrect to say increasing the value of an ability is what it means (more x say to increase the sum), like wise MM1 goes on to say dragon's use their wings and breath weapons. The TD section sets up a number of natural weapons based on size, keen sense, blindsense, DR/SR/FP etc. MM1 simply contains so much more than this one line so it says DWK are not TDs.
2B. Draconomicon, primary source on TDs.
Again,
one side bar is quoted out of context. This one is page 4's all TDs advance through age categories.
Advance is a strong word to throw around, like
Prepare. The first reaction when reading this would have been to assume it means
Advancement. And yet again one sentence is pulled from a book while everything else is ignored. Over the next two chapters you are given side bars that are rule entries, like the MM1 they cover all TDs have wings, SR, DR, FP, Breath Weapons, etc. Even a nice update to the MM1's immunity to one energy is updated to immunity to one attack form which helps since Positive/Negative energy isn't energy nor is Light and such.
2C. Misc
Pretty much every TD section in a monster book reads off like the MM1, barring two subsections of TDs. Lung and Planar. Both lack spellcasting, Lungs add a bunch of stuff and Planars are like yeah all TDs have spellcasting but we don't. This is probably where the concept of exception came in (see below) as fundamentally the problems is TDs have dozens of awesome traits and Kobolds don't get crap.
3. F*ck D&D, we're playing my own game. Exception trumps.
Since the DWK can never meet such a huge list of requirements, you need to create a bullcrap excuse to start ignoring them. By dropping these 'requirements' you cna make it easier for a DWK to qualify.
Planar lack spellcasting? DWK doesn't need spellcasting.
Fang lacks breath? DWK doesn't need breath.
And so on. Except in no official TD can exceptions be found for FP, SR, DR, Blindsense, gaining Racial HD from Age, and SLAs. So we're two house rules in and still failing. And even, mindful this isn't how D&D works. For instance you can't draw your weapon as a free action just because you can find someone that can via the Quick Draw Feat. Even the DMG and RC can be quoted (rules order) to blow this out of the water so this is one hell of a house rule to work with.
Generally, all arguments play around in that area ignoring each other as needed. Like Kobolds
are an exception, they are a TD and they are proofs that you don't need stuff like gaining Spell Resistance from your age, like a Fighter casts spells because you said you're fighter casts spells and it's proof. It can range from something as stupid as the elven wizard comment last page to something as retarded as last page like people argue otherwise so it must be fact. In essence, they all detract from the rules and argue illogically about the subject because the poster him or her self is completely unable to prove anything but desires it to be true so badly they don't understand how much of an idiot they sound like or why you can bash them over the head with their own stupid remarks.
However there is a 4th, honestly is the best anyone has ever came up with.
4. New approach. Using house rule 1 (you can qualify to be another race) you quote a parenthesis explanation in Dragon Magic's Dragonpact's Creating a Dragonpact rules.
Except, read the Errata. Where a rule comes from matters. Literally anything actually discussion TDs is a more authoritative source. As indicated by the primary source (draco) DWK is not a TD, as indicated by several secondary sources (MM1, MM2, DoF, MoI, etc.) DWK is not a TD. RotD, primary source on Kobolds and DWK even says no. Like the kobold chapter readily addresses and includes DWK Kobolds, yet still notes in the flavor portion how they get along with TDs. The complete list of all TDs doesn't include DWK. And so on, there are more proofs otherwise and zero for support making it a one sided
fight, no fight is a bad word. More like a train vs a fly, something is getting plowed through as if it's not even there. So if Dragon Magic's Dragonpact's Creating a Dragonpact's rules present anything that may contradict those sources (such as one single requirement, tds have 12 age groups). The Errata says to ignore it.
And for bonus points, Dragon Magic campaign stuff mentions kobolds awakening their draconic heritage (DWK anyone?) may conquer nearby tribes. Yet this is all done under the notation of you don't have to use TDs, instead their offspring (half-dragons) and worshipers (such as kobolds) to have a draconic themed enemy. So it's shot down on two fronts, intent and RAW, and if you attempted to merge the rules into a single cohesive function you'd actually append the requirement of 12 age categories to Draco's list and Draco's list to Dragonpacts thus not to exclude either of them.
In summery.
All intent says Kobolds are not TDs.
All primary and secondary sources on the matter say no.
The entire thing hinges on a houserule to begin with.
And as noted and thousands of unnoted things. All but one argument fails even using it's own logic, like as seen in exceptions. The final point has no rule priority and using it is contrary indicative of more authoritative sources.
Bottom line. DWK Kobolds are not TDs.