[Fargren]

No. The worse case is when the topmost floor is the most likely to break the egg. And it's not reasonable to to assume anything about the distribution, so there's not a "most reasonable" case. Except maybe assuming that the higher the floor, the higher the chance of breaking the egg, simply because we are talking about things breaking and height plays a factor in that.

EDIT: actually, the worse case depends on the algorithm you are using; if you are using linear search, the worst case is when the egg won't break for any height. So yeah, in that case the distribution is uniform. But it seems like grasping at straws.