I never use MSN.co because of ther bad results, but these days I must have a eye on what they are doing, but today when I made a few seaches, almost evey result was good and I never liked the results on MSN.com
The results I am seeing still look to be Yahoo/ink (namely as before) but I think if you have not used MSN for a while, what you are seeing is the fact that these results are much better than they used to be. It is not the "big switch" though from where I am standing.
I don't know whether your opinion derives from your good position or just from an objective observation, but I have to disagree. When the first 40 results includes Tripod, Geocities and Angelfire (!) sites, then it's everything but pretty good. BTW it was a travel related search. YST results are awful..
I just made a few searches for some products, free services, my own stuff thats all and the results where better then I have ever seen on MSN.com, because I never use that engine because used to be complete crap. There results arenot the same as on Yahoo.com.