For about two weeks now I've had three bridges running but none of them is getting any real traffic yet. Example :
It usually doesn't have any OR connections at all, and never goes above three (with two being the bare minimum for building a circuit).
RD wrote a great article on the lifecycle of a normal relay, and I already have data on what the lifecycle of an exit node looks like, but after how many weeks does a bridge get enough users to be useful?