No they weren't. Mostly financial companies with arcane firewall setups. They usually had opened things up only for more popular conference software like GoToMe

No they weren't. Mostly financial companies with arcane firewall setups. They usually had opened things up only for more popular conference software like GoToMeeting or Skype, so that is one of the problems faced when using a newer technology even if it is a better experience overall. Time will tell if WebRTC solves these issues, it was only just launched this week.