I rode across Boston, about 5 miles from JP to Allston, this morning. At 9:30 there were slippery compressed tire tracks on our side road but the main roads were already slushing out. I fought a gusty north wind on the way there, so progress was doubly slow. Studded tires front and rear were somewhat helpful but I was getting down to pavement the whole way so thin tires would have been OK too.
Coming home at 3:30 was much worse, even with a tail wind, there was 4 to 6 inch deep slush most everywhere and a large part of the bike path in Brookline had hard slush that made riding impossible. I made it fine and had fun, but I will not likely ride tomorrow because things are going to ice up as the temperature drops.
I just switched from a Sturmey Archer 3 speed hub to a Nexus 7 and I'm glad I made the upgrade because the selection of lower ratios were very helpful in snow. Rain gear and good boots make this sort of riding so much more comfortable than it would have been a few years ago!
Matt