That's a pretty disappointing graph Brian, as well as a disappointing response from Austin. I guess I would be hard pressed to explain that as well, not that that is an excuse. That's unfortunate Austin has chosen to no longer participate in the discussion as the thread was for the most part was lively yet constructive. I must say such data and behavior does not inspire me to pay such a premium for Maxamps batteries. Such is the line between poor and foolish I guess.
For consideration Brian, here is a graph of my Neu 3S 2500 30C/60C batteries on my CRT.5. Please not that these were purchased in Jan 08, so comparable to the 1yr old models you have from MA.
As you can see, the batteries were holding approx 9.3V (3.1V/cell) at 85A draw (35C) and the highest output occurred towards the end of the pack where there was a 114A (~45C) discharge that yielded 8.9V. Please note that the pack was nearly empty, as the resting voltage was ~11.3V, so it represents a 2.4V (.8V/cell) drop. I'm not sure how a 60C discharge is determined however. This run was a considerable stress on the battery, but did not create any puffing or overheating.
To be fair, I don't know that I would advise running a pack so hard. I did run the pack even harder in some grass tests later on, managed to kill my lehner and the pack has seemed a bit flat ever since. Hence the need for accurate ratings. Theoretical burst ratings are fine and all, but do not help much in determining the performance or appropriateness of the battery for such an app.
Overall I highly recommend NeuEnergy lipos, and they can be had for really good prices if you care to look. They have been a bit more powerful than any zippies, but far better cell matched and constructed. You can buy nearly two Neu 4S 25C or 30C 5000 packs for the $250 the original MA pack is listed at.
Let me dig out a 4S zippy-h graph that replaced this system.