The Tire Rack has their latest Winter catalog out, and in it there are preliminary tire test results. I'm assuming a more comprehensive article will be up on their website eventually. Here's the catalog. http://www.tirerack.com/images/pdf/ITwinter07.pdf
In the catalog they have 60 foot acceleration times on ice. (a hockey rink).
#1. Blizzak WS60 = 4.6 seconds
#2. Dunlop Graspic DS-2 = 4.9 seconds
#3. Michelin X-Ice = 5.2 seconds
#4. WinterForce Studded = 5.3 seconds
I know the Winterforce isn't considered a cutting edge tire, but it's still encouraging to see three modern studdless tires outperform it in this specific test. From what I've heard the Graspic DS2 has a new tread compund this year. In past tests I don't think it has done this well.