I also still have the stock tires (15,000 miles) but plan to get true winter tires next winter when the stock tires will be nearing replacement. The stock tires are not terrible but if the snow is deep enough or of just the right/wrong type the MK3 FF is a dog.
Maybe we should get some feedback on how the various winter tires handle the snow as I'd be in the market come next December.
So, I'll keep my stock rims (17's) and put winter tires on them next winter and then as the winter is coming to an end I'll likely order a new set of wheels (17's) with summer tires from Tirerack.
2012 FF Ti HB Sonic Blue, Built 5/7/12, 401A + Parking Technology Package and MFT w/NAV 3.0.2 -> 3.2.2 -> 3.5.1 -> 3.6.2