Shooters unfamiliar with the mechanics of high average skeet often use a whippy shooting style like swing through, which is not conducive to high skeet scores with any gun weight. High average skeet, as well as high average quail, is better shot with long hold points, sustained lead, and short moves to the bird. This technique makes the disadvantage of a light gun more imagined than real.
I think the issue here is that many of us use skeet for its original intended purpose, which is practice for hunting--especially upland hunting. (It was invented as off-season practice by a bunch of New England grouse hunters.) We're using our hunting guns, calling for the birds dismounted (to practice the mount), etc. Sustained lead works well when you know the distance to the target, which never changes in skeet. It's more problematic in the field on live birds, where every shot is at a different distance and offers a different angle. "You need X feet at Station 4" only works when you're shooting a Station 4 bird--or if you're lucky enough to get a gamebird that flies just like a Station 4 bird.
