How will the new ///M vehicles track?

[B-Line]

I just got back from the track yesterday.. Was at Buttonwillow in Socal with the Porsche.. And couldn't help but think, "How are the X5M and the X6M going to track?"

I keep seeing them advertised as a street car, hauler and vehicle that can be used for a track day. And while of course, I don't expect it to perform like a 911 or a F430, I'm wondering what the reality of it's extended track-ability will be?

Will those monster brakes be able to take the pounding of lap after lap. Is the body roll going to be out of control? Is the vehicle just too big and heavy to perform well? Are the tires going to shred up from all that weight?

Of course we need to be realistic, it's not a sports car... But is it really a track-able vehicle? Can it really handle 4-5 30 minute sessions at 8-9/10's ?

And who will be the first X5M owner to the track with their ride?