Well, I was confused when I posted that, but there's actually a whole padding infrastructure set up that appears configurable somewhat.
With some review a proposal could theoretically be made to make things constant-bandwidth for those who have the patience and bandwidth to use that. The min-max times are consensus parameters and they describe the distribution.
I'm not a privacy expert, but I can compare two matrices of bandwidth usage changes, and wouldn't be able to if they weren't changing.