Why rye instead of wheat? There's quite a bit of cost difference.
Good question. Why do we always recommend rye? It's what I've always sowed, but I never even gave anything else a second thought.
EDIT: Dave, I just remembered I tried the Japanese Millet last fall during the heat, and it popped up in a matter of days. I sowed Bermuda on a bare prepared clay surface, and using a 50/50 mix of the millet and the Bermuda, next to it.
The millet definitely slowed the Bermuda growth down, but it had a good solid ground cover in a couple of weeks, with only a light dawn and dusk watering. I'll probably do the millet this spring, just to get some areas ready for the Bermuda.