I agree with Tonymitsu.
The author does seem to have some concepts down, like the two divine casters being good at fighting, and using the Animal Companion, Wild Shape, and DMM to good effect. He's right about the Warblade, at least at the low/mid-low levels.
His comments do fall apart at things like Dodge/Mobility on the Scout, and in the comments when he mentioned Polar Ray as a comparison to Eldritch Blast. Also, his honorable mentions of Paladin and Fighter seem odd, although he didn't list a level cap. If he were talking about levels 1-6, or something, he'd make a good point. There's actually a really good chance he hasn't played much past 5th - 10th level; a lot of people don't. Also, he did pick up that at higher levels, the infinite spell slots wouldn't matter because casters have more than enough to last all day by that point.
End result: it looks like he gained most of his knowledge directly through playing, and he seems pretty good at finding synergy. In a "standard" casual game, he might even get branded as a min-maxer/munchkin.