Yeah I agree. But I still say it's a personal thing, and depends on what your style is. I've been in some crazy metal bands. Black metal for example, and they play straight 16th notes at 240 bpm for 5-6 minutes. I never had a problem with loss of endurance or lack of speed picking with the wrist. It depends on the path you take, like in baseball you can't say pitching straight over is better than side-arm pitching. Each one is good, but both is better, I think. Especially for expression in your playing.