An anecdote that I previously posted on another thread and will repeat here:

A couple months back, I flirted with moving from NYC to Las Vegas for tax reasons. I was shocked at the expense of luxury housing there, and 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 had increased the cost of all things high-end by 50-100%--basically in the span of a year! She was very bearish on the market.

It seems some measure of rich flight is playing out in California/Nevada; enough to transform segments of the housing market. It's not far-fetched to imagine the same with New York/Florida.