Brushless power... How much?

Brushless setups are obviously very powerful, but how powerful? How much torque per-feet does a brushless motor like a CC 1515/1y produce, compared to an LRP .28 for example?

Brushless motors get full power pretty much instantly, while nitro motors take awhile to get up to full power. But I was wondering, is a brushless motor still more powerful even if you compare their power at each of their peaks? Not just from the get go..

I've seen some drag videos done here with a brushless motor. I don't remember his name, but he had a 1527 in an E-maxx, and beat out pretty much all nitro motors, including a Baja.

Also, I was wondering, if you push down (Prevent it from going forward.) on a brushless car with a powerful motor, like the CC 1515, and hit the trigger, will it just stand there and hum, or will it shatter the gears/spin?