For me traction is either there or it's not... over the rear wheel, anyway. I did discover, however, that by shifting my weight reward I can save myself from a spill if the front wheel starts plowing. It's sort of counterintuitive; my mind is telling me to put my weight over the front wheel so it will bite down, but that just results in more plowing. Shifting my weight over the back wheel lightens the front end enough to enable course corrections, allowing me to avoid spills (which is sort of the idea with winter cycling). This technique only comes into play when I'm riding through "mashed-potato" consistency snow, when the snow is conspiring to push my front wheel around. While I use flat bars I would imagine the technique would work equally well with drops since it's just a matter of shifting body weight. I use trekking bars on one bike and Ergon GC3 grips with integrated bar ends on another; both allow me to stretch out and duck down while riding into headwinds. That being said, when I grow up I want to use drop bars.

This is why I don't want to try riding a 'bent; I'm afraid I'll like it too much and then have to explain to my wife why I need another new bike (or two).