Not sure why you see CO as offering anything better than DL? For those purchasing Economy tickets DL offers 150% EQM for Y/B/M fares. CO on Y only to match UA's lame program. DL is also offering Y/B paid upgrades on Intl flights at check-in. Looks like CO is now only offering that to Y not B. It's so in vogue to slam DL and glorify the old NW days. However, if you do a full analysis across the airlines, DL's 2010 is absolutely without competition. UA is so desperate to catch up they just sent me an email today with a strange Elite Extra program to throw a few more SWU to their Elites and offer a Free Red Crappy Club membership to their 125,000 + EQM flyers. Yes - maybe it was better at NW years ago - but so was the case at all airlines. Now they have all cut back - but DL still leads with it's 2010 program. With all these Double/Triple EQM promotions- it's all getting watered down and impossible to compare with the old days.