Quick answer is yes.
SCROG does better for Sativa's and hybrids, as it gives you a more even canopy, than Indicas, but any support will increase your yields. The less energy the plant has to put into holding itself up, the more it can put into the buds. In my SCROG's I incorporate LST, topping and other training methods as well. The pictures I just threw up are, sadly, not in SCROG and you can see how they're leaning every which way. If I'd have put a screen up instead of just throwing a quick cycle in, I could have probably added an oz at least.
You don't have to have the screen up in veg, just put it in once they get flipped and weave the branches down as they stretch. I usually stop weaving about a week and a half after flip, so I have the last days of stretching to develop colas around 12 to 16''.