Lelz. The "exodus" of reddit's powerusers, ever in search of ego-petting, have landed ship here, and brought with them the hordes of their followers. They never had thoughtful discussions to begin with, amassing 'karma' with quick snipes and silly images, and their minions will only dampen this website even further. Your downfall has begun. Mwahahaha
You seem to have misinterpreted joelg236. He made no reference to a growing user base being bad for Hubski per se. That said, I don't think that all types of growth will necessarily help Hubski in the long term, particularly if content is suddenly being posted that is in conflict with the primary objective of the community.
I have a twitter account. In my feed I see what I want to see. I have a hubski account and in my feed I see what I want to see. I ignore tags and I ignore users that don't interest me. My feed looks the same today as it has since I joined, interesting and full of good content. I found this post in the global posts. I don't think growth will be a problem. People that want to "circlejerk" can and will and I won't have to see it. Fine by me.
It's mainstream now, is all. Put on your black framed glasses and get some records with artificial reverb, we're going full Brooklyn Heights now!