Nevada has no income tax. This is actually why this observation is interesting to me. I thought tax changes were causing the slowdown in my area in Northern CA as well, and figured NV would be getting a bit of a boost, but I guess not.. so maybe it is a real slowdown after all.
A data point for your consideraton: One month ago, I briefly flirted with moving to Las Vegas for tax reasons. I was shocked at the expense (and shabbiness) of high-end housing there. Construction costs were similarly high--I was quoted $450-$500/sqft, on par with NYC. My realtor explained to me that rich Californians were "stampeding" into Nevada and causing some serious dislocations in real estate. She thought the market was eventually going to crater.
Nevada doesn't have a state income tax.
Nevada has zero income tax. Only property and sales tax. The property tax is very low too.