jim is just trying to make excuse for his opinion.
I've been to Montana and Kalispell is beautiful area, but you don't see 3-lines of freeways with bumper to bumper weekend traffic. I did not count gas stations in Vegas, but it has to be about 500 of them. How do you compare that to your local area?
Point is that when driving with TC, most users will fill up at popular destinations.
So as of today, diesel in Vegas is over 10% cheaper than regural.
Florida is about the same
Texas coast diesel 20 cents more.
So with diesel burning 20-30% less than gasoline, you will save quite a lot of money even with today's prices.
I will only watch the difference changing when summer arrives.