[Theohazard]

I agree that using the slide stop is usually faster, but - for me at least - I've found that the slingshot method is more reliable. I've fumbled way too many times with the slide stop during speed reloads. Also, big, easy-to-use slide stops usually get in the way of my thumbs when shooting, causing me to either lock the slide open prematurely or cause it to not lock open at all.