http://www.rcgroups.com/forums/showthread.php?t=1242354
Here is the thread on a G3 EX 45c 2200 pack, lot's of graphs.
It can hold 3.5v/cell @ a 40c + discharge; and @ 23c discharge, it's only 122F, that's 2.5 mins from 100% to 90% DOD. It appears, looking through his other battery tests, the 2200 size pack (and maybe 2600) have the highest performance per mah capacity in the G3 line up.