[Noo Yawk]

I agree with Clark that the ability to read hands is the advantage. Folding top pair, no kicker is no different than folding an overpair or any reasonably strong hand if the situation calls for it. As a matter of fact, the ability to value bet middle pair, or raise weaker holdings in certain situations requires the same skills as those required in folding top pair. Bad players lose money here because they never lay down ANY pair, let alone top pair.