Ping.
This new theory makes sense. It seems obvious that the Wisconsin Glaciation receded from south to north, so it is logical that animals and men re-populated the area from south to north.
Another problem with the old theory -- the Bering Straits land-bridge may have been dry at the height of the glaciation, but if they crossed it, how could animals or men go by land along the coast south of what is now Alaska? There must have been deep glaciation inland and glaciers from the mountains right into the sea.