Because this was NOT a discussion of "deep discount" fares. It was a discussion about how AA's SWU's and int'l upgrading are so "superior" to Delta's.

"last-minute"? No, I gave 7 and 14 day thresholds, you have given a 1-2 day threshold. I do not consider 7-14 days in advance to be "last minute" I consider it regular or in fact a bit of advance purchase. I consider last minute both for business and personal to be within 48 hours.

Thank you for pointing out another key point, that the JFK-LHR route is perhaps the only route on which AA and DL compete in both airlines European networks, and they have only in fact competed on it for a year or so, another factor ignored by many.