The difference is in the head, and that's a very very big difference in tennis.
It is .... but time to change that. I hope (wish/pray) that Connors knocks it out of Andy.
The non-American players know that they have to do decently on both surfaces. And they don't use excuses to stop them.
I know it's unpopular right now to champion all surface players in the States, but it's something that annoys me immensely. I love watching play on the different surfaces (even though I admittedly clay is my fav surface) - it's like the change of seasons.
I believe the reason we aren't reading many articles here in the US about de Villiers 2009 schedule plans is because it fits the new American philosophy of "hardcourts and only hardcourts". It's a shame - clay will go the way of grass and that's not good for the game - which is played world wide and not just in the US.
That's my rant for the day.