I haven't been shooting nearly as long as some here, but I prefer shooting split finger with a glove. I tried a tab a few times and couldn't shoot very well. If I ever switch to 3 under I'll probably give it another try. If I stuck it out with a tab I might find that I would have a cleaner release, but for the most part I think it wouldn't have a very large effect on my accuracy compared to the other aspects of shooting. JMHO.
I occasionally shoot a couple of shots without the glove just for kicks. Most of my bows are somewhere around 60# at my draw length and I'll be the first to say that, even though the first couple of shots don't bother me, I'm not manly enough to do that for target practice. In the cold? Forget about it.