Umm, no.
Mike Williams and Gandy over Carey and McDougle? Not even close.
Mike Williams is an unmitigated BUST, and a terrible pass protector for even a RT. He's never started a full season, and averages more then a half a sack a game. Williams has never given up less then 7 sacks in a season(And that's only playing 14 games), while McDougle has never given up more then 4 sacks in a season.
Gandy isnt a starting quality LT. He's a Guard. Carey hasnt proven a whole hell of alot, but he isnt nearly the run blocker Carey is, and certainly couldnt hold his own vs. Taylor in practice.
Villarial is better then both of current guards, but Anderson? Uh, no. He's a run blocker and that is it. I wouldnt be comfortable asking him to protect my snickers bar from the furious pass rush of a sugar-crazed 5 year old.
Teague wins out by virtue of having more experience at this point.