RE: How fast is fast?
A decent charger will charge 8s at 6 amps, so shouldn't take more than a half hour to charge most packs. Even less if you don't complety deplete the pack. It should be interesting to see what people do with the new 60C lipo's. We should start seeing light 200mph planes soon.
It's cool that you can now have a 200mph electric f3d plane that you can taxi to the runway and have full throttle control in flight. With some throttle management, they should be able to stay in the air for a decent amount of time.