I have a lot of experience with Blizzaks. I have been driving sports cars in the winter for many years. Part of the reason is related to what you said in you first post. However, there is another reason that people rarely point out. Driving a sports car in the winter with an excellent snow tire is very fun. When you talk about Blizzaks there are 2 different series, the LM which are performance winter and the WS which are a more serious studless ice/snow tire. I have preferred the WS series because they will give you a lot of confidence in the ice and snow. I had LM's on my previous car, a 350Z, for 2 years and WS's for about 7 years. I now have a boxster and it took some research on my own to figure out a winter set that would fit with WS series tires (I also bought a factory aluminum hardtop). LM series will work fine but WS series is what I used in these driving events below. These were regular blizzaks on pure ice:
One timed lap at my 1st ice driving event. Lake Sinissippi, Hustisford, WI 1/23/11 - YouTube
Drifting play at my 1st Ice driving event after all Timed Laps. Lake Sinissippi WI 1/23/11. - YouTube
I'm not the greatest driver but I feel like the winter driving practice makes me more comfortable and confident when I run into conditions like this when I drove at the Autobahn last year:
9/18/11 Autobahn South (rainy). Advanced group HPDE. National Auto Sport Assoc. event. - YouTube
Get some blizzak WS tires and have some fun when the snow falls and the ice lines the streets!