[Batfish]

I've had that conversation with Greg Covey before, as well. The "limitations" he mentions are the Deans connectors on the packs. FMA states that the Deans connectors are good for 60A, but just about everyone knows that higher currents are pushed through those connectors daily without problems.
FMA makes this statement as a warning and to cover themselves. Since the Deans connector is rated at 60A, FMA states that the connector limits the pack discharge at 60A. While this is not a true statement, I'm sure it's more of a legal formality and disclaimer than anything else.