I agree with the posts about IWTSHC.

What do people think about players who are called down, refuse to roll their cards until the player that called shows and then muck their hands. Is it reasonable to ask to see their cards, since they were called and are supposed to show first?

(sidenote - I think slow rollers are even more nitty than IWTSHC. If you have a winning hand you should be gracious enough not to let someone else think theu have a winner for 15-30 seconds. If someone pays to see you then you should flip quickly unless you want to muck unseen and concede the hand).