Interesting, I'd imagine some guys don't give it much thought? Either that or, like archery, the better shooters may consider their bench form to be something like a trade secret.
Usually forums are quite helpful, and this one has been no different, great group of guys/gals here. So I'm guessing most just may not consider it to be a huge factor in accuracy as long as you are consistent in your shooting form.
I just tend to be one of those highly analytical types that picks apart everything in shooting (gun and bow). This is just one of those things that came to mind the other day as I watched other guys shooting. I've always held on top of the scope to do exactly what you are saying, keep the muzzle jump to a minimum and control the vertical recoil. At ranges 100 yards and under with my muzzleloader (actually a scoped percussion side hammer), shooting off a bench, I can group very tight...putting them nearly in the same hole. So the "top of the scope" method always worked quite well, but at these short ranges it may be entirely moot.
On a different tangent of accuracy, I can definitely see the benefit to loading your own cartridges though, similar to muzzleloading. You can control the powder, bullets, etc...shooting off the shelf ammo is like...a strange unknown. Granted they are acceptably consistent (floater here and there), I'd imagine you could achieve superior accuracy by loading your own. Sometime in the near future, I can see myself loading my own...seems like the way to go.