Originally posted by presfoxm
The worst thing was that I lost the use of my thumbs last night.
I know this isn't what you're asking about, but it got my attention. It's not normal or expected. It's probably caused by restricted circulation during the ride due to too much weight on your hands. Did you notice any hand discomfort while riding? Usual recommendations are to change hand positions often, and raising the h-bars. Sometimes changing the tilt of the saddle can help, too (usually tilting the nose up a little).
Good job on the century!