It depends highly on the routes. As a 1P, I had my e500s clear at the 72-hour mark for ORD/PDX last week (now if UA could just get them posted more quickly, since the outbound flight gave me the miles for the next batch but they didn't post so I had to buy a pack). I had an A ticket ORD-SEA-SFO-ORD a couple weeks ago, but we had empty seats up front on ORD-SEA (757).