Jack Dorsey has been a known bitcoin bull for a time now, and I don't think it's something quite unusual to say the least. What's good about him is that he doesn't shill out for bitcoins and let the markets decide for itself, though I think he'd love to chime in and engage in discussions regarding cryptocurrencies and bitcoin on his founded platform, twitter.
Social media, especially Twitter, have begun to draw more serious discussions than many forums, "This forum and Reddit." It's good to promote support for someone like you.
I agree. It seems like more and more serious topics have started to deviate from the common hubs of discussions that people have been using for years. Just goes to show that bitcoin isn't just confined into a few places right now and we're still growing day by day.