Rick Shiels did a video on that at some point ... wait ... *searching*
I think they changed the angles quite a bit in the video, though. Not sure I would notice 3 °, at least not consciously. Probably would feel akward, but I guess I would just automatically stand a bit more upright/hunched over or grip a bit shorter so that the swing plane changes accordingly. I would probably hit terrible shots, but that would not register as being so unusual ... so, I guess I would not really notice what had changed.
