this battery charging question

first off an apology Brian (factorykitted) for hi-jacking his thread. i know better and i'm sorry.

just when i think i have a handle on this stuff, i read something and it raises questions or i second guess myself.

specifically what i'm trying to understand is what difference does it make if you recharge your stereo bank with 1.25A or 10A+ as long as they are being fully recharged before their next use?

i understand the importance of a charger that is "smart" or has different stages of it's routine, but why is it important that the bulk charge be at a high amperage versus on the lower side?