It's very unusual. I think largely due to the fact that the cities and 95 corridor didn't have 1 pure snowstorm this year. Every single one has mixed. If we had a uniform 4-7" storm once even, that would have smoothed some of these gradients.
I think you have to have done a little better than me. I'm now at 17" for the season and I'd wager you're more like 20"? But the bigger difference has been between us and Sykesville area. You've definitely done better than your old house in Elkridge though I'd say.