Today I did a few test rides and one of them was a cervelo s3 on zipp tublulars and dura achee. One thing I noticed was the effect of aero. obviously that's the effect of the wheels to a great extent, but nonetheless the bike felt noticeably faster. However I had less confidence handling it as it seemed really "delicate".

I know it is a sacriligeous thing to suggest but is it possible that a slightly heavier more solid feel might be suitable for most casual riders?