I've offered my sentiments before (oh, wait, that's right -- those who can, do, and those who can't or didn't, coach) and Hall's phenomenon is nothing new. The legs only have so many hard miles and, especially, marathons in them, and it's not unusual for an athlete to deliver a PR within the first few attempts. Hall is stale and risks never returning to his old form. UNLESS he backs off and doesn't run another marathon until the trials (assuming he is an auto-qualifier or qualifies with a 10k), I'd bet he doesn't make the team in 2012.
He seems addicted to training, and while he may yet "pop" a good one in here somewhere, he needs to give his legs a lot of rest, get back to some different type of stimuli like Ritz did on the track, and recoup, IM-not so-HO.