Made a brave move today, replaced the winter snow tyres, with the summer Yokohama's...whether its too early only time will tell!!
I can report that I've done 3000 miles on the winter tyres, no change in fuel consumption, possibly a softer ride, down to the '55' profile, but best of all better grip and traction through out all the snow we've had.
Would I recommend winter tyres..yes, and before I bought them last november i was sceptical about theyre worth, this winter has proved them.