Well I was out yesterday on my one carbon bike. I absolutely love it. The feel is different but there is no doubt that it needs to go fast! Quite comfortable too.
Yesterday was the 8th straight day of 40-60 miles a day without a rest day. This bike carried me for another comfortable and pretty effortless 50 miles.
The "dead" feeling bike I'm dealing with is a Klein Quantum II, it's really fast but feels like a bit of a dog under me. Still trying to sort that out.