Looking through the Ametuer Leader board on the Single Play 18 at SA, the top 4 or 5 Ametuers are shooting in the 60's...pretty dang good considering they have only been members of WGT for a few days each.
To think I've been playing for 2 months or so, and just shot my first sub-70 round today....
I'm betting there are a few extra bags of sand laying around.