An interesting point that was raised on the VIP Day (see thread: http://www.flyertalk.com/forum/showthread.php?t=729227 ) was that they're experiencing less and less no-shows nowadays.

In the operations piece of the tour, they said in prior years, CO would see 10% of bookings simply not show for their flight. Today, they said that number is closer to 4% which makes planning for bumps on the airline side a little more challenging. People who book flights today are much more likely to be on that plane compared to a year ago.

While the involuntary/voluntary denied boarding numbers speak for themselves, have you noticed your own no-show rate changing on CO --and if so, why?

I've been booking a lot of full Y's (or better) lately ...on CO and other carriers. My schedule has been a bit crazy, so of my last 10 flights booked, I flew 2 and cancelled the other 8 less than 72 hours but more than 24 hours out. I haven't no-showed on a flight (or missed one) in a very long time. I'm wondering if others are in the same boat ....or maybe there's so many penalties and restrictions on non-Y tickets today compared to previous years that people are doing everything possible to make the flight they're booked on.