Thanks for clarifying amateur vs pro - it's easy to overlook the fact that dan levels are completely different when comparing amateur and pro. Is it that 7 dan amateur is roughly comparable to 1 dan pro?
I think 8d ama can start to have competitive games with 1p or 2p... I mean they're getting into the same ball-park in terms of strength but averaged out over time a rank above _will_ beat a rank below, that's why they are in the ranks they are in after all :)