Yeah, of course it does. The top pulley reduces the angle by 1/12th, and the bottom reduces it by 3/14ths. I think - I might be a bit too stoned to be sure.
Bigger pulleys, less angle. There's more wrap than you'd get with a longer cage like the upgrade kits, but I'm pretty sure that counts for jack shit, it's just the articulation angle that matters.
BTW, these pulleys I bought off eBay specifically to jam in my Red derailer, which took them with no modification. Different story with the Dura-Ace number, had to cut off one pin and go more than halfway through the other one.