My Finnish tires turned up sure enough, and they seem very nice indeed. I can see how they'd be very useful for lots of riding over lots of consistently grisly, frozen terrain.
But as rough as Somerville Ave is these days, I don't think that warrants switching to studded snow tires.
So I blew $100 for nuthin... wouldn't be the first time.
I rode to work this morning, and despite a temperature in the teens and remnants of 10 inches of snow from a few days ago, I was still fine with my Panaracers. A little extra vigilance is the important thing.
Yesterday I brought the bike inside and spent an hour or so cleaning the drivetrain. I did a pretty thorough job on the chain, chainring, and rear sprocket, using various Pedro's cleaning supplies and a couple Clorox wipes. Ran very smoothly today.