Somehow I am reminded of Top Gear's test of the BMW versus the Prius - if you want good gas mileage, get a powerful car and just drive it like it is a Prius.
OTOH, if you try to drive your low power car like a 370Z, you won't be saving much gas
As for the snowbelt, I bet you knew where you lived before you bought a 370Z, so don't blame us
(And I am switching back to the RE050's this week as the last <32 night should be Wednesday.)
I think we are lucky the 370Z just has to pay for the incremental cost since so many parts are shared with the 370Z and other cars, and I hope that means the group will continue.
Of course, with the Nismo and IPL models being too close to badge engineering, I don't think that helps Nissan's overall cause like AMG or M models do.