Maxamps not up to snuff?

I have in the past destroyed a number of the 6Ah packs under conditions that they should have been ok in. I like the maxamps packs overall because of the bang for the buck factor, but when compared to other "better" packs, they don't stand up.

I recently had a short lived interest in parking lot drag racing and I could really see (according to our Bushnell radar gun) a difference when switching from a 5S 5Ah maxamps pack to a Neu 4900 (I think it is) 5S pack. The difference was worth a couple to a few mph over 132 feet of running. To me, that's substantial.

Lately, I've found myself going with the Neu and Flightpower packs for applications that need them and the truerc packs for applications that don't require so much battery.