Here's a 70A discharge graph
http://www.rcgroups.com/forums/showp...3&postcount=19
It appears they would be good for 100A+ if they are warm... temperature of the battery is important jsut like lipos.
Check out this chart of GP3300 cells... at 45*C (115*F) to 60* (140*F) they do pretty well imo at 80-100A and the newer 4200 should be better than this.
http://www.rcgroups.com/forums/showp...3&postcount=19