Out of the 5383 events that qualifies for IPR, 4374 are the Hold'Em variant constituting 81.26% of all forms of poker.
# 1001
Well, I believe that poker absolutely needs a solid ranking system to rank the players in the world and the IAR appears to be on the right track towards accomplishing that goal. (Daniel Negreanu, one of the best All-Around poker player in the World)