Does anybody have any idea how many tier points you'll earn in J or P class on US Airways? They're upgraded business and first fares respectively, and are listed on the BA earnings chart as business and first, but earning 100% Avios. But then do you earn J/F tier points, or full-fare Y tier points, or discounted Y tier points?

At the moment, for my calculator, I've assumed J/F tier points, but will maybe have to wait for somebody to fly one of those fares and report back to be sure! (It's a shame you can't bung a fare class into the official BA calculator.)