Seems like it worked, you got tons of politeness! xD Though I believe it's just random, I don't think the forum's team would code a calculator for that just for April's fool joke!
You'd be wrong.
It actually is a real stat (counting instances of "thanks" etc. in posts). But he has a lot of posts. 
Politeness, Imagination, and Coins were calculated based on all of your past posts, but they don't update real-time. fMerit, Virtue, and Karma do update roughly every 20 minutes. But only Staff, Donators, or VIPs will find themselves able to adjust their Virtue that quickly.
Theymos takes April 1st very seriously.