I bet you %30 of people who voted won't even play at all.
Classic had 10, 15 (I think was the cap for BRS), 20 and 40 man. TBC had 10 and 25 man (Kara is the only 10 man I can remember though) and LK switched to using the same content but with 2 fixed raid sizes (10 and 25) and 2 different...