I almost bought some 6000s today but ... didn't.
When I got home I took mine out to my forest for about an hour, most of it was crawling but a good 10 minutes worth of 2nd gear bashing. I'm pretty sure the stock nimhs lasted the longest they ever have, at LEAST 45 minutes! 2nd gear totally kills these crappy batteries, but they seem to last forever if you're just crawling.
Get that video up!