Playing live you would be suprised what some players will lay down.
I was up against QQ and I had the speed limit 55. I had raised 30 preflop and got it down to heads up. The flop came J 6 9 rainbow I made it 100 to see the turn of he let em go. He said he had put me on KK. I was using my tight table image and being aggressive when I played. I took down the pot around 80. If I was to check on the flop, I would have lost control of the game and lost the pot.