Assuming you swing the same speed, a longer club definitely has a faster speed since it is wider outside the circle and is therefore travelling at a faster rate than a clubhead that is nearer to the centre of the cicle. So I'm sure that makes a bit of difference. If you compare the length difference between your PW and 3 wood say, I'm sure that amounts to quite a bit of difference. For a high handicapper perhaps such subtle differences don't really matter, but on a competitive basis, I'm sure that must mean something?