The real question is:
Are you guys comparing winter tyres to poor quality/budget summer tyres which are absolutely lethal in the wet or cold?
Or are you comparing to good quality tyres that grip pretty well in the cold & wet, such as the Eagle F1s? I still have Eagle F1s on (yes it's a mk2, but not relevant for the purposes of this discussion) and they still grip very well in the cold and damp weather.
I'm comparing them to the stock Bridgestones and the Dunlop Sport Maxx which has an 88/100 rating for wet grip at http://www.tyrereviews.co.uk/Tyre/Dunlop/SportMaxx-RT.htm. My Nokian's rip them apart for wet grip.
My mate has just had 4 new Eagle F1 fitted to his MK6 Golf GTI and he says they're awful when it's cold and wet. He actually regrets getting them.