It may be.

I run the standard setting in my lightning and my 10XL is ripping the car apart!

On the EPA note, i may have done a stupid thing, I dont know, I setup my 9920/9XL as normal, with the epa at 100 and after i set it to 120, it seems faster now :). Although, my esc gets to about 150 after 5 mins on 14 cells, extra heat from over throttling?