Do many people commute from Boulder to Denver?

I know, and have known, many people who commute Boulder to Denver and vice versa, and they all say the same thing "I couldn't do this forever". They do love the extra time for reading/working they get by taking the bus, which is fast and reasonably efficient. Currently, a good friend of mine told me that she is thinking about leaving her job for another, solely because of the commute to Denver.

I don't know anyone who works in Denver, but there must be some