Gordon, I know you can read a graph (
) so here's some interesting info. These are 3S 2200/2250 mAh nominal packs
Note how my Gens Ace and Revo 60C packs cross over at about room temp and above that the GensAce has the worst IR of all. Also how the ordinary Turnigy Nano might actually perform better than all the others in cold weather but the Turnigy Nano A-Spec blitzes them all at anything over 18degC.
Usual disclaimer about this is all based on only 1 or 2 packs I happen to have applies.