Road Tire Performance in Rain and Snow How well do road tires perform in rain and the snow? I've heard narrow tires are better because they actually can put more weight/pressure on the road through the wet/ice. 

I just bought Continental Gatorskin tires, live in Boston, and just want to know what I should be thinking about in adverse weather conditions.

Relevant info:

Riding Cyclocross bike ~35-45 mi/week with 10 mi (roundtrip) commute. Occasional 30-40 weekend jaunts, and am coming from much more threaded cyclocross tires (I never rode off-road much).
Slick tires, like your conti's, have no problem in wet conditions. If the streets you ride in Boston in winter are just wet with occasional light slush you're fine with what you got. 

You'll want knobby tires if you're regularly riding in something soft like dirt, mud, packed snow or very heavy slush. Slick tires are significantly more squirrely in those conditions. In that case, typical cross tires will be better.