The Myth of the "Real M Car"

On two occasions in the past week I've had brow furrowing moments where someone made reference to a "real M car." The most recent being the comments on Chris Harris' comparison of the M6 GrandCoupe, E63, and Jaguar XFR-S where someone said "Finally maybe people will respect the M5/6 as real M cars." ...this raises a… » 1/24/14 4:12pm 1/24/14 4:12pm