I realize that this is a performance car and many drivers like to take risks, but some of these risks seem silly to me. Tires that work in cold-weather are less expensive than a car accident.
The camaro I saw probably put out close to 500bhp sent to the rear wheels. When that kind of ridiculously unneccessary power is put to a hard brittle summer performance tire in the cold, something is going to give and its not going to be the 500bhp. One of the rear tires shot right off the wheel. The wheel was probably damaged too from driving on the bare rim. Granted, the Fiesta ST doesn't have anywhere close to this amount of power, but the concept is still the same. You are testing something in conditions that it wasn't designed for.