I live in Salt Lake City, and...
I can tell you that I had the Goat out yesterday, and was cruising between 85 and 95 on I-15 and felt like I was "average". Some faster, some slower. Normally 75 is about the median speed though.
Our interstate here was recently refinished prior to the 2002 olympics. While they should have done a couple of more lanes, it is one of the most advanced in the country. Glass smooth. The only beef I have is how our carpool lane is used... That's another topic though.
BTW MG, I keep telling my wife we need a 3rd, but she's not going for it.
Utah has a law against polygamy. Not everyone adheres to it, but the ones who don't are slowly going down ala Warren Jeffs.