Nice Setup! I heard it is common for new winter tires to behave this way until they are broken in. With more driving, you should be ok. I think it had something to do with the oils in the tire or the coating applied while in the mold.
Exactly why I drive mine, people think that I am crazy. I already have the M5 and a 540iT, and a motorcycle. I do not need any more maintenance costs. Also, then you are storing an extra "winter beater" in the summer, etc, etc, etc, and if you say that you can just buy something then sell it in the spring, good luck with the market the way it is, and unless you get something that you KNOW a lot of maintenance has been done on, you are going to have to get the "winter beater" into shape to actually handle the winter.
Nice looking winter wheels (although they would be better if they were an inch bigger). Personally, I drive the ///M during the winter (unless the roads have not been plowed), but I do understand why one would garage it for the winter especially if one wants to preserve the car for long-term use.