Jeff has convinced me that A8 and A9 deserve better treatment. One thing in particular: TPTK with a 8- or 9-high flop is IMO much stronger than TPTK with jacks and queens and shit out there. Don't you think? I know I feel much better about it.

I still don't like 6 and 7. There, as Fnord said, the tiny kicker margin is trivial and probably accounted for by the tiny wheel possibility. So I'd call A6s and A7s pretty much garbage unless on the button or some non-card factor promotes them. And I'd call A5 and below Somewhat More Interesting Garbage (SMIG)