SFO based PM here. I fly on off days mostly for pleasure and almost always on T fares. Have been pro-active using sdc to improve my chances and irrops rebooking via Y has helped as well.
100% on SFO-JFK (6/6)

.
40/41 for upgrades in 2010 (missed SFO-ATL on a Fri night red-eye).
Pretty decent I would say.