The three-day convention earned more than 9.5 million total tweets, according to Twitter, in sharp contrast with about 4 million total for the GOP gathering last week.

Obama, who has the sixth most popular Twitter account in the world, has long been at the forefront of driving tweets-per-minute records for political events, although no political moment has prompted the kind of Twitter traffic that a celebrity event can, such as Beyonce announcing her pregnancy on live TV (prompting 8,868 tweets per second). 

Obama brought plenty of star power to the convention stage, and many celebrities — including some accounts more popular than Obama's, such as Lady Gaga's — added to the tweets about Obama's speech. Some were alternating between comments about Obama and the MTV Video Music Awards, happening the same evening. 

—Updated at 9:28 a.m.