During the time when Spotify broke the 3 million track barrier and had its largest ever update (123,600 new tracks in one update), Spotify has averaged 18,371 new tracks per day over the past couple of weeks:

In the past week, Spotify has seen its number of followers on Twitter grow by an average of 100 new followers per day:

And during the working week, there are over 1,000 tweets per day that mention Spotify:

Impressive, until you compare this with iTunes (shown in pink below):

Perhaps I’ll check this chart again in about a year or so… 😉