"That would be a painfully slow process! In my opinion, the slightly scalloped surface of some timbers that many associate with adzing is probably actually the result of finish hewing with a narrow axe, which leaves this same finish."
No, it is not the same finish. Some people to mistake it for adzing, though. It would be real easy to see the difference. The narrow axe will leave a skewed track where the adze would be in line with the length of the timber. I don't think even a lipped adze cutting across the grain could be mistaken for axe tracks.
