If you are high-sticking and just letting the shot bounce along the bottom, I can't see where it would adversely affect your drift. Even with an indicator or dry/dropper rig, if you are set for the proper depth I would think it would work fine. The trick is, and what this rig may help achieve, is to get your fly all the way down to the bottom without hanging your fly up on snags as often. Oh, and I forgot to include in the original post that the author recommended tying a knot in the very end of the tag to keep the shot from sliding off.
Fly fishing - it's cheaper than a bass boat!