I don't see anyone reacting "Instawho?", let alone doing so "quite rightly". Instagram is extremely popular. Stories about how Instagram's backend works have been at the top of the front page on HN for weeks.
I think you think this is some kind of Jets/Eagles thing here, and I'm wearing the green jersey. No. I don't have a side, and I don't think the competitive battle happening here is rational; I just acknowledge that it is happening.
Small point: Your Jets Eagles analogy is really opaque. I'm still not even sure if you realize they both wear green jerseys. (I assume that was the point, but it's most unclear.)
I think you think this is some kind of Jets/Eagles thing here, and I'm wearing the green jersey. No. I don't have a side, and I don't think the competitive battle happening here is rational; I just acknowledge that it is happening.