I can not believe I agree with Mikey!?!?
I have trained with "quick lifts" and have not seen much in terms of improvement outside of the gym (including athletic performance). I have been lifting for some time, so any increase should have been noticable - especially considering how much improvement I was told I would see if I started doing them. Don't get me wrong, they are fun and presented a much needed change of pace. I just don't view them, and I don't think you CNS or muscles view them, any different than any kind of movement.
I think it is generally difficult for someone to say, "I did Power Cleans (or Clean and Press, etc.) and I got results." How do you know that simply strengthening the muscles, connective tissues and bones via training against resistance is not the cause and that the quick lifts are or that they added "something more" ? The "experiment" is not controlled enough to make that claim.