[JTrout]

I would agree that it would be much different pressure than they've faced, but not necessarily more pressure.

The pressure of tour school, or the pressure of needing to make the cut so that you can play the next tourney instead of heading home is pretty high.

I can only remember freezing over the ball one time. It was on the tee of the 108th hole of tour school.

I've never played in the U.S. Open (Hiroshi has), but that's got to be pretty intense, as well.

I would think that the better (more experienced) players would handle Big Break pretty well. They have a small number of competitors, some of whom are clearly inferior.
I would think their confidence level would be pretty high.

I could certainly see where the bottom tier of players would be under more pressure than ever.