I don't get jarred around on my road bike. Ohhhh...that must be because my forgiving carbon road frame takes more of the harshness out of the ride than my mountain bike's suspension! The mountain bike is aluminum, after all, and it's only got 4" in front and back.

Check your road bike fit. Sounds like something's wrong. My weight's not on my hands on either bike, and it's not because my bars are abnormally high. I think more of my weight is on my saddle. I've never had my hands and wrists hurt after long road rides...my sitbones and stuff sometimes feel it though.