I suspect his problem is geography. I haven't lived there, but I can imagine that in NYC when you deal with Rails shops you get to talk to sleazy "MBA types" as opposed to traditional startup hubs like SV and Boston, where you typically have no problems finding cool hackers to work with.
BTW: I don't think he is an arrogant asshole, he's just just brutally honest, NYC-style. And yes, Ruby/Rails folks often smell too much like "get-rich-quick" in their blogs/posts online, so I am not surprised if they are indeed shady in real life.
If you haven't lived in NYC why is the assumption that only sleazy MBA types work there. I am tired of people bashing the startup culture here in NYC, I believe there is a healthy community of startups in NYC anything from etsy, kaltura, tumblr, buglabs, amiestreet, delicious(started in NYC), hakia, viewdle,teachthepeople,clickable, wixi, commandshift3, and more...The concentration might not be like Boston or SF, but I think people forget there are 10 million people in NYC and 2 major universities ( NYU and Columbia) which make for a large number of developers.
BTW: I don't think he is an arrogant asshole, he's just just brutally honest, NYC-style. And yes, Ruby/Rails folks often smell too much like "get-rich-quick" in their blogs/posts online, so I am not surprised if they are indeed shady in real life.