For 2010, I am 100% upgrade for K or higher fare. I am about 30% on LUT fares. Clearly, my upgrade percentage on cheap fares is lower then last year, but given the decrease in capacity and diamonds, 30% is probably realistic. I don't really care when DL upgrades me. I am just as happy to be upgraded at 5 days as the two times that a GA has come on board the plane and moved me from coach to a FC seat. Upgrades are a nice perk, but I wouldn't dream of expecting them on any fare, particularly LUT.