I rode a black lightning for a while and it was definitely fast and stuff. However to me, it rode roughly.
I went back to back between it and a steel Bianchi and every time, I wanted to convince myself it was not the bike... but in my experience it was. You could especially feel the difference if you ran over a road reflector, chip seal, or cracked pavement. My steel, lugged frames sort of thud over them. The Cannondale would fly into the air.
I would mot be surprised to learn that those Cannondale users with steel forks do not feel that the ride is as harsh, however.