[Dylan Wade]

Ice,

You make money in poker by your opponents acting unprofitably. What the guy with a QA on the Q74r flop doesn't know is you have KK.

Imagine this, turn everyone's cards face up. Now if any pair or draw can call your bet profitably then you should wait till the turn, but that's not the case in a 10sb pot.

Although QA is a great hand and QA hit his flop hard, he is still losing money calling (or raising) KK's bet in this scenario. Of course the QA is correct in practice raising here since theres a wide range of cards Mr KK could have, but if KK exposed his cards, QA would definitely be making a mistake raising.

Of course you could be up against 44 so you'd feel pretty stupid waiting for the turn only to get 3bet by 44. =)

In big pots things are different because in a big pot people are making less of a mistake calling, and some players are even correct to call. Since you're not sure if you're ahead or behind, and you're facing many opponents, you change your plan to maximizing your chance of winning the pot. the way you do that is punish weak draws that are drawing thin... pairs (on the board), like QA on the previous board, often have enough hidden outs to profitable draw in a large pot. (HOwever, I think betting straight out is correct again on the turn for this scenario)