I'm on Year 2 of a NHL save created after the latest update and I noticed that my fans have given me a 94 percent boost at the end of the year.
I can't say for certain but I believe this has happened on another save as well with Buffalo. I had a very poor year and the last in-season update in April had both the fans and ownership unhappy: flash forward to July 1 and they're both 100% happy. I didn't notice exactly when that boost happened in the Buffalo save, but the Nashville save you see in the screenshot it seems to have happened immediately after the season ended.