Hmmmm.. I test drove 2 different 300c's and didn't notice anything about the steering. Coming from a Ram 2500 diesel too. But maybe I was to mesmerised by the sound of the Hemi to notice.
But, I did notice "over responsive" steering which you could call light, in a Pacifica that my Wife and I test drove. No Hemi, so I could pay more attention to other things.