We have no evidence that opp is TAG, based on the post, as a rule. A raise is a PERFECTLY viable option, but a lot of weaker opponents will freeze up on the turn if they miss again. At that point, we take down the pot with a bet, and we can do it at a slightly cheaper price than a reraise on the flop will afford you. It has its risks, certainly, but I wouldn't say that a flat call is a horrible option.

Differences in style, perhaps.