I have 17" pure winter tires. Breaking is the part that makes me unhappy. Maybe it is related to the fact that they put tons of salt on the roads and that is a slippery mixture. When snow gets deeper I will do some testing. Have some great roads for that near here. Let's see....

And BTW: dropping tire psi is not a good idea. Winter tires should have a little bit more pressure then summer tires (+0,2 bar).