see i just recently went brushles and i think that what made people say the packs last longer is because if your feather your brushless system and dont floor it and only pull as much speed from it as your brushed motor would have it will last longer.my 4600kv mamba will acceperate as fast as my orion 13t mod motor with only 1/3 the throttle.i tried it once and my pack lasted way longer.see brushless will handle so much power that if you floor it you will suckyour pack dry quick.so i guess what you can say is brushless provides longer runtimes OR more power,not both.its like a turbo.if driven at 65 miles an hour and normally through town it will provide better gas mileage but if you floor it and start running major boost and making 500 horse power your tank will be dry quickly.we should do a test to see how much mileage(not runtime) you can get from brushless vs brushed.2 cars,stock equivilent motors,line em up and floor it and see who goes farter.now i know this would be a hard expeerament to do because you would have to be riding in a car chasing it for a mile or more and the brushless would certainly wear the pack quicker than brushed time wise but it would go so much faster.40mph for 5 minutes is 20mph for 10 minutes!i bet the brushless would go farter befoe the pack quit.but yea try to drive it only as fast as a brused motor and it will last much longer,but if you want to squeeze some nos,its there for ya.go brushless.