I tried running the benchmark again today on my iPhone 4
This time I tried closing all background applications, disabled wifi & cellular data, & put it on airplane mode (the test takes about 20 minutes and I didn't want a stray phone call interrupting it). I then re-booted the phone, and ran the test.
This time it only scored (overall) 45. Thats only 65% of my 1st run.
Reviewing the scores, it seems most tests were within 10% except web, which dropped from 56 to just 10
I cant explain this. Except maybe background tabs in safari, but that seems like a long shot.