From what I've heard of the admissions process, research experience and the letter(s) from your research advisiors are by far the most important factors in grad school admissions. The GREs especially the subject test, don't seem to count much. One of my friends got into the pchem program at Berkeley even though he refused to answer any ochem questions on the chem GRE (which is somewhere around 40% of the exam).
BTW, I'm applying to the biophysics program at Berkeley, so if you have any hook ups there...