Continental is rumored to be faster- but I read on another forum that the knitter who won the world's fastest knitting contest knit english (yarn in your right hand).
I knit english, and I am happy with how fast I knit. I do move my entire right hand, in a quick motion, around when I make a stitch. Continental is usually thought to be faster because the yarn is (held in the left hand) and "flicked" around the need with the left index finger. You can actually do the same "flick" with english in the right hand, and that would be a lot faster. That way, your right hand never leaves the right needle, only your index finger moves.
I've been trying that "flicking method" but can't seem to do it. But, I knit fast enough the way I do now. Practice and you will get faster. Make sure your hands are comfortable and relaxed too. I find circs faster than straight needles b/c they are easier on my wrists and hands and the wieght of my work is in my lap.