Edge, thank you - We just came back from the new Mini showroom in Rockville and Ryan in Parts basically stated everything as you described.
Our concern was that perhaps we did not receive the correct tires for a Mini in our temperature zone, but he assured us that every CooperS comes with these same "Summer" high performance tires.
I think we are going to wait until we wear these down and then in December we'll switch to the All-Seasons on the same 17" alloy rims we already have.