i'd answer, but my database sample is small, i buy in for 250bb, and i've run like Allah for the last (first) 8k hands in my database. i would guess it depends a lot on your style of play. and your stakes. if you're a winning 9/7 at 2nl then i would expect it mostly comes from big pots vs fish. if you're a good loose aggressive player at 200nl, possibly more so from the smaller and medium pots. thats just a guess. the truth may be the exact opposite