Urban Wild,
I'm on the edge between zone 5b and 6a, so we may not be that different depending on the Winter we are having. This year has been very mild. As for your snowdrops if you planted the species G. nivalis (the common snowdrop) you should only see noses up right now. My suggestion for next year would be to plant some G. elwesii. That species can be early, mid or late season depending upon the bulb. Use a reputable supplier (Colorblends, Brent & Becky, or Sheepers). Plant in early Fall and plant where the bulbs will get Spring sun and Summer shade. You'll get great results that way.
Steve
This is the double, Lady Beatrix Stanley
