I shot w/ a glove for years until I spent some time w/ a couple of serious target shooters. Guys that never really hunted, just 3d and indoor stuff. To me, a tab felt very clumsy at first but the more I used it the more I liked it. Wouldn't go back to a glove now. I use the Angel tab, made in Japan, not cheap but very well made, it has the spacer which is beneficial.
One thing about a tab is that they last so much longer due to the thicker, harder leathers used in them. I was going through a glove every 4-6 months but I've had the same two tabs over a year now and they are still in good shape.
I definately get a cleaner, more consistant release.