Its gone up quite a bit, I don't deny this factor. However, also increasing are burdensome zoning regulations, impact fees (in some case 25% of the sticker price of the home), construction caps, affordable housing programs, etc.
I think parts of Colorado are a bubble on top of the nationwide GSE bubble. There are many reasons I rent. The bubble is beginning to pop here. The is an unbelievable glut of office space, and finally rents are starting to fall. Still its $800/mon. for a 1BR 600 ft. apartment. We have a long way to fall.
Having a average home value of 275K$ with 15% appreciation per year when the average salary is $50,000 isn't sustainable. I think we have overshot a wee bit.