It’s been a while since Cadillac has been the “Cadillac of anything” but the winds are changing. Last month I drove the Cadillac ATS and found it to be the *the* car for BMW shoppers that think BMW is going soft. With the Cadillac CTS, GM has BMW’s 5-series and Mercedes’ E-class in their sights. How’s GM’s aim? Join me as I find out.