How are they measuring users here? Is this all-time-registrations? Or "actives"? Because if this is registrations, I thought they were a lot bigger already. Regardless, awesome!
No way. How many programmers are there in the first place? I bet you it's EDIT: Back of the envelope by other people put it between http://stackoverflow.com/questions/453880/how-many-developer...
Under that perspective, one could say that Github has captured the attention of 4-8% of everyone capable of understanding the app.