All tickets booked on CO.com offer 100% EQM next year so I don't understand what the problem with the Virgin codeshare was. If you booked it on CO.com and had a CO flight number you should get 100% EQM regardless of the fare class.

I'm not sure that this is accurate. I am still trying to get a firm answer out of CO about booking a flight on NW on CO.COM with a CO flight #. If you notice the new rules specify COntinantal, Contiental Express and Continental Connection. It does NOT say VS or NW.