My 14.4V brushless MT2

[Serum]

Indeed, a GPS measurement is not accurate, unless you run it that speed for like .5 mile or something..

I've got this gps in my car that tells the speed, when I'm accelerating from 0-60 mph, it takes quite some time before it really stabilizes to the 60mph..
If you accelerate as fast as your RC it's not accurate at all. I'm sure when you drove it longer on top speed you would have gotten another number. (higher)