Rick Welch favors the dead release, and Rod Jenkins favors more of a dynamic followthrough, where your hand ends up moving back after releasing the arrow. Both are champion shots, and both have videos out that you can compare.
"Dead release vs. back tension" is a misnomer. Any good shooter, whether he uses a dead release or uses a more dynamic release, will absolutely maintain back tension throughout the shot. Any collapsing of back tension, which is evidenced by a creeping forward of the string hand at full draw, will ruin the shot. The difference between a dead release and a dynamic release is that the forces between the bow and the back exactly balance in a dead release, while the force of the back gradually increases through release with a dynamic release.
My own opinion, after studying both methods, is that it is easier to maintain back tension if I am gradually increasing back tension until the arrow is released. If I am gradually increasing back tension, my back tension is not likely to collapse. If I'm trying to hold a specific amount of back tension, it could go either way without me really being aware of it. But the dead release certainly works well for Rick Welch, and many of his students.
Both Rick Welch and Rod Jenkins believe that more accuracy can be achieved by holding at full draw for a second or two than by releasing as soon as full draw is reached. If you're having a problem releasing after holding for a second or two, that may be a type of target panic, and you might be better off addressing that problem rather than trying to change something else.