I just thought I will share my experience. I am Alaska MVP Gold with over 90K EQMs flown this year. I tried to get a status match on Delta (Sent request around 11/11), and they sent me this challenge:
6000 miles between Dec 1,2005 and Feb 28, 2006 will get me Silver
12,000 miles between the same dates will get me Gold.

No direct bump to even silver!

I am thinking if I should even switch now....am trying to figure out how many bonus miles I will lose by switching vs. miles I cant get on Alaska for flying Singapore Air, Air France, etc.

Edit: I sent a printout of my Alaska Air mileage activity, a copy of my Gold card, and of course, a request letter.