Come on, there are entire companies that specialize in forum spamming. They create accounts on popular sites (which OCR is, don't you know), and then try to integrate themselves into the local community. They might wait days or even weeks, depending upon their "policy".
If a company can do it, why can't a music band? Get a few friends or members to go around to music sites and drop some links. Would it really be that hard? Hell, you could google "music sites" and get a few hundred sites ripe for the spamming.
I'm immediately weary of anyone that signs up and the first thing they do is go on about how great whatever service/product/group is. Like i said, he had three weeks to participate in any of the hundreds of threads here. But instead, he makes a new one about some small-time band that just happened to release a new album, not even a week ago.
That sounds pretty damn suspicious to me.