Good point. The data I reported is for "shelter" only, excluding utilities, furniture, etc., so I'm not sure how that looks on the income curve. You're also reporting average income, not median. Median income is much stabler, having climbed about $6000 since 1990.
My main point is, people are spending more on housing. It's not a mirage. It is highly concentrated where there are jobs, but of course people move to where the jobs are. It's facile to say they should move somewhere else, or that they are getting "more" for their housing.