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 February, the number of new registrations fell, compared to the previous month, and tweeting in general rose, but the growth in the amount of tweeting slowed. "New registrations are down for February by 12.2%. Total tweets for the month rose slightly over January at 7.4%,