The concept that caddy hit the 3-series benchmark in the inception of a new model, let alone the evolution, is indicative of the competition in this segment but also the inability to sustain constant true driving-dynamic-innovation in each model cycle.
Will the ATS sell well? IDK. The BMW 3-series doesn't sell well because it's the driving pinnacle - it sells well because of cheap lease deals and the desire to obtain the image associated with a BMW 3-series. Caddy has to steal into that segment, as Infiniti's G-series has accomplished well.
F80 m3 - 20k miles as of April 2015....08 535xit - 120k miles