If there has been--and i think it's possible--it's because the A-holes haven't been on contention as much.
Look at who is on the top of the money list.
Luke Donald, Webb Simpson, Nick Watney, K.J. Choi, Dustin Johnson, Matt Kuchar, Bill Haas, Steve Stricker, Jason Day, David Toms, Adam Scott etc., etc.
Can you imagine a more vanilla, bland, no-temper bunch of nice guys than that???