[johnc]

I see two times where waiting for the turn is better in terms of winning the pot: 1) you got the best but somewhat vulnerable hand such as two pair with draws on board - you call flop bets, see if the turn card is a blank - then you can bet/raise/reraise(this is not a slowplay!), 2) the pot's too big on the flop to get people to fold to your better holdings so wait for the turn when the bets double allowing your bets/raises to give those longshot draws improper odds to continue.