I don’t use Google fonts often, but I can certainly understand @TheDoc’s vote. I think the better question would be why you wouldn’t recommend Google Web Fonts @ChristopherBurton?
You say that you use Font Squirrel to generate the correct @font-face CSS, but Google Web Fonts also use @font-face. The rendering may not be as nice as Typekit, but it’s no different to using Font Squirrel.
Is it due to their selection? Not everyone will have the same tastes as you or I.