Each month, we look at Twitter's growth based on total tweets and new user registrations. This data is supplied by Matthew Daines, the lead developer for our own Twitter app Twellow . In March, the total tweets sent increased 29.8% over February , the largest month-over-month increase since July of last year. User registrations rose 19.3% over February. Tweets sent per registered user jumped almost 20% to 13.4.