We have what we call Prowess, a comparison of how you are doing against a very large history of people the same age as you.

Alot of that data that you were being compared against was very old and not really a fair representation of how things are.  Sooo, I nuked 1.6 million data points of old data prior to mid 2017, so you are only being compared to people mid 2017 and newer.

This changes what your prowess displays as, HOWEVER, this is just cosmetic.  Your XP hasnt changed, nothing has changed, just the people you were compared to - to see how you stacked up against everyone at your current age.

Its set at wiseguy intentionally.  This means you have to wait at least a decent amount of time before you can poke and prod at the game to figure out how much XP things can get you.