Crysis or Crysis Warhead. Not the same benchmark, not the same results, and between maps there is a huge difference; those numbers

Crysis 1900x1200 4AA +16 AF DX10 Very High
min: 30 .**
avg: 43 .**
max: 54 .**
don't mean anything without more info about what benchmark was used; the fact that they refer to "DX10 Very High" means it's Crysis, not Crysis Warhead, so comparing the results to Crysis Warhead is apples vs oranges.
Without info on what map it was; if it was a fly-by or not etc... no conclusion can be drawn from this; an average of 43 fps at 1920x1200 4xAA/16xAF can be had with a slightly OC'ed HD 4890 in Crysis... depending on the map/benchmark.