It happened to me in June, EWR-SFO on CO. They did not release about 6 or 7 seats in BF on a 757 until about 30 minutes from departure. I asked at my origination point, at the Prez Club and at gate counter and got the same answer: "we'll release as soon as we start bording." Six of us on EUA standby got upgrades and there were 2 seats left open when we pushed back.

Yep, they allwasy DO want to sell those A Transcon seats until the last minute.

BTW, Transcon is nice, same level of service as BF International.