Obviously the article is about being a drivers car, and fun to drive, not which is fastest around a track. The M3 is represented by the E30 and E46 on their list (surprised they picked the 46 over the 36 though).
Corvettes, despite being fast, are not known for being particularly communicative to the driver and the foreign press has always complained about the cars poor chassis tuning for their roads.
Seems I picked well though
http://www.mjswebgallery.com/carz2/images/_MJS4451_V4.TIF.jpg
.