Just fine. But all the times I've fallen, have been when I've been going slow.

3 out of the 4 times I've fallen off the bike in the past 5 years, have been in the winter on ice/snow conditions.

So my precaution not to cycle if I know in advance, any ice and snow on sides of road, really stems from these experiences falling...on a bike path or once on a very quiet residential street going up a gentle rise with black ice. (Imagine going down such a rise on black ice..)