This is a good news story, with regards to sensitivity to jolting I would like to let you know how I brought this symptom down from a 8/10 high to very low 2/10. For me I think it was my weak and injured neck muscles causing this particular symptom. I noticed my neck was very very sensitive to touch.

After starting with a new physio, they recommended putting heat pad on my neck and relaxing it. Then when neck is totally relaxed, start doing neck stretches. Then I started to do isometric exercises to strengthen the neck. After about 2 weeks of doing 1 hour morning and 1 hour night, this symptom has gone way down. Bumps on the road rarely bug me now.