Thanks! Info much appeciated! Hmmnn....the "Blue Carpet" has me intrigued... if I miss boarding when FC is called at US/UN, I walk to the front of the Zone Three boarding passengers as unobtrusively as possible --- and hope no one hurles bad fruit at my head....HA!

I'll post my after-flight observations on the CO FC experience, compared to US or United. I think this is my first 'betrayal' in close to 10 years.