Yep tri girl.. the more you are in them, the more stable you become. I remember way back when I wouldn't consider taking a hand off of one of them to eat a gel, scratch an itch, swoosh a bug away, etc...
But riding in them as often as I do, I could probably do the dishes, cook dinner, and maybe even change a diaper.. BUT I do agree that they aren't for organized rides.
For this reason the only group rides I do are with other triathletes.