DB was also on water w/ 6800 ultras, the above example uses "vapochill cooled 6800u cards" which is the extreme of extreme cooling well I take that back it's still considered extreme since your basically running -100+ C temps...but yeah those score can be improved b/c "stock volts no mod" I'm sure they will figure out how to "pencil Mod" and bump up the bolts etc.
also, I've seen FX 53's run higher than the 3265mhz, so there is still much more room for improvement...basically anything is possible as we see almost daily w/ technology...and on another note, not all cpu's and gpu's are created equal...some ust OC higher than others