Largest Ruby on Rails app?

Seen in a brochure at PayPal X:

LinkedIn uses Joyent infrastructure to run the largest Ruby on Rails app with over 2 billion monthly pageviews.

  • I thought LinkedIn was Java, when did they switch to Rails?
  • 2 billion monthly? When I left my last company, our (PHP) app was doing over 7 billion monthly, and wasn’t even in the top 10 PHP applications out there. Surely there are Rails apps bigger than that.