I went STRAIGHT from my 1987 steel Sirrus to the carbon-fibre. The contrast was astonishing.
When up out of the saddle, the bike is so physically 'decoupled' from your body that the weight/mass difference is at it's most noticeable -or so I found, at least.
Under those conditions, 'laying into it' made the bike dart forward from under me so noticeably differently, that I felt it 'propelled' in an entirely different manner in terms of how the 'motion' was experienced.
It was such a thrill that I HAD to get one.
Don't throw the baby out with the bathwater; I still enjoy taking the Sirrus out once in a while... I found that I ride it rather differently, and it exercises different parts. -I'm beginning to se what people mean about "the feel of steel".
But yes... a carbon frame is an absolute revelation!
I looked into another local bike club that rides close to my work in the evenings, and looked at their paths and times... They're claiming ~30MPH average ride speeds... SCREW THAT!!! I'm sorry... I'd be 'dropped' within a hundred yards!