If you build it, they will come has a flipside- if it's not available, people will find other ways.
I had heard about the ridiculous Jet Blue cross town flights stunt. I had not heard about bikers and transit users taking the opportunity for a multi-modal race, and whupping the plane. As anyone who has flown into Houston's Intercontinental airport knows- flying doesn't take nearly as much time as all the folderol involved in flying (driving an hour to the airport, getting your bags, security etc etc).
I thought that this article by Tom Vanderbilt had a wonderful conclusion about what this kind of challenge can show us:
"the reasons people give for not cycling in America are often as much failures of the imagination, or a priori rationalization, as anything else"
In other words, people think biking is harder than it actually is.