UPDATE: there is an update comment below. Each dot is a tweet.

Log scale makes the decrease a lot less apparent, but it is 5-10 fold across the board.

Edit: Just came to mind, that it isn't fully representative of the true expected decrease. Since posts would likely be viewed for days, or weeks, depending on algorithms. Data-wise, it should smoothly-ish decrease towards today. Guess time will tell.

For data set and code see: https://github.com/Eximius/sentiment-analysis-test