Cyclocomps are like cell-phones. They demand your attention when they don't really need your attention, and take your attention away from all that other stuff you could be paying attention to on your ride.

Of course, I think there should be a happy medium, such as taking along the comp... but with a cover over it for the ride, and you can read your averages at the breaks in your trip. Or leave the comp detached during your "viewing of the lawns" rides, where you gawk at the miniature botanical gardens put out by those folks with crazy good green thumbs...