True or false most pro boxers dont pivot the foot they push off it?

[OMGWTF]

So push down method, is it more powerful or less powerful than the foot twist method?

I prefer the foot twist method and I prefer to use it the way scrap recommends. But alot of pros, like Tyson, Tua, Fraizier, etc etc prefer the push down method.

Which is more powerful which is better?

Heres the push down/ push off 1st method

http://stream1.gifsoup.com/webroot/a...s/159589_o.gif


Heres foot twist 1st method

https://www.youtube.com/watch?v=vmAFFvdGc_o