Was the same for me. Day I picked it up was first day of snow, and we set a record cold spell last winter. We usually have liek two, thrre days of snow during winter, last year we had a solid three months.
The stock tires are utter crap, but very entertaining. They can take any kind of abuse and come out looking unused, and they are very slippery. I have had mine on 20.000km of normal driving, 6-7 trackdays, took them to the nurburgring, went drifting for a day and generally abused them for a whole season, and they still have a mm or two to go before the wearmarks. Replacing htem next year though, going for 18" summer tires, as performance is less of an issue with dedicated track tires. Mostly for looks and decent street grip.
I'm gonna need pictures of that FR-S, though... :-) What colour is it? ANything done to it?
If you're gonna do any performance mods I highly recommend Circuit motorsports. They e-tune your car, and it turned out REALLY good for me. Torquedip is nearly gone and top end is stronger. Sounds awesome too when the cams work their magic in the midrange.