I would think you'd get more than 10 minutes - or am I missing something? I get 20-25 or so running my Flux on 6S Zippy 4200's, and 20 minutes in my Revo (MMM/1515 2.5D) on Nue 5S 4900's. I realize the Revo is quite a bit lighter than your 8 - but I'd still think you'd be in the same ballpark.
Must be tall grass.....!
I think run time is very subjective. Most of us might be suprised if we actually put a stop watch on our run times (which I have never done) - and driving styles, etc prolly contribute significantly.
Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES