Totally agree with you Jonjo! Although I've not experienced real snow like your photos, we have been in early December and absolutely loved it. Blue skies, chill in the air and walking down Main St with the Christmas Carols playing is just lovely...as Jonjo says, rides were walk on, we only went for 2 nights and did absolutely loads of stuff - had the best time.
Remember, there are loads of places to warm up, hot chocolate sold everywhere and I think the cold is easier to tackle than the pouring rain which we experienced last week.
If I could get time off work this year I'd be there like a shot!