Other than it being a Regal/Malibu in a purty RWD dress? Nope not at all.
A friend of mind has a 2014 2.0t Malibu with full exhaust, cai, tune, and better tires and we are pretty much dead even from a dig up until about 50mph then I start pulling away.
Quick cars w/ mods I imagine the ATS would be slightly quicker with it being RWD no? You can get the turbo Regals in AWD though.