Happens now and then to me, it's only alpha though so it's to be expected.
8600gtsli is only getting 30fps? You should be getting more than that. This laptop has a 8600gt (single) and it's getting better than that.
Set a replay on repeat (use hampa's headkick one) and do /bm
Leave that running & see what average it comes up with, post it on here.
[BTW Hampa - your flames kill frame rates lol]