I really hate thread titles with this vernacular. It really seems petty and classless, especially for a skater of Jeremy's grace and calibre, to say he's done/finished/stick a fork in him. Athletes train really hard and whether they end their career on a high or choose to keep competing is something that should be on their own terms.
That being said, I think Jeremy can still make the US team, but without a quad he has no shot at the podium. Unlike 2010 where a quad in the SP was a nice thing to have, now it's practically mandatory.
As far as him pulling 80-85 points, I think he can hit around 88 with a clean program with no quad. I mean, he got 80 points at WTT with a fall and no quad in his SP. But unlike 2010 with Lysacek, he has to be perfect to get into the top 5... needs a quad if he wants to hit the podium.
In regards to Daisuke not having a clean quad, he still gets excellent PCS and with a decent skate, he can still win, even with no quad or a fall on his quad. Jeremy won't be afforded the same. It's interesting though to note that even with all the errors in the LP, Abbott was still given PCS of 83.5, almost 10 points higher than Max (who had about the same errors, but at least did quads). I think Jeremy can make the US team if he plays it safe and puts out clean programs, but will need the quad for a shot at the Olympic podium. It's hard to say... a lot can happen over a summer. I had initially counted out Weir, but last season although he fared poorly, he still showed that he could land 3As and come close to landing quads.