Not sure how an AGM stratifies.
Mex once typed the high amperage recharges helped force the migration of electrolyte through the glass matting and into the plates, which makes it seem that stratification of resting AGMs by gravity or just temperatures, is not likely to occur.
I rarely subject my single AGM to high inverter loads, but this subject interests me.
As far as PT's request for charge acceptance of AGMS.
Well here is some testing and data on a lifeline gpl-31t( same battery as Mex's lifeline)
http://www.pbase.com/mainecruising/effect_of_charge_rate_on_agm_batteryHow it relates to PT's tellycom jars is unknown to me.
This is a good one too:
http://www.pbase.com/mainecruising/voltage_vs_soc_lifline_battery