You probably right then Dave, I just thought I remembered hearing it was fast during combine coverage, wasn't 100% sure though.
Regardless of the fast or slow turf, Vernon Davis ran the same exact 40 time (4.37) as did Lee Evans at the combine in 2004.
Personally I'd be happy with Davis, Ngata, Huff or trading down and getting either Hali or Bunckley and at least another second rounder.