User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-173.189.226.12-20130410174113/@comment-198.91.10.183-20130411022245

It may be a diminishing return. Past level 100, it may take two boosts to stamina to get the same increase that one boost used to give. Can anybody confirm this?