Don't look now, but 42-yr-old Chad Campbell is currently leading the Career Builder. Chad averages 285 off the tee (last year and this year combined averages). Hadwin (Mr. 59) ranks 117th in driving distance, averaging 294.
It's not just a distance thing. You put most of these guys on a well-conditioned course, receptive greens, no wind... they can shoot low scores. Sometimes incredibly low.
We might see a couple more sub-60 rounds this season, then again we might not see another one for several years. Lots of factors besides how far these guys can hit a golf ball.