Median house prices mean little....many higher-end (>$5MM) houses are cleverly kept out of public records
Median incomes mean even less....need to see IRS tax return data, not silly self-reported census data....and many business owners, incl hedge fund owners, are able to legally report a "tax-advantaged" income on their tax returns
House prices tumbled some 40% in the early '90s recession
Housing prices tend to be a slow-motion, multi-yr process in any deep recession....after all, no one needs a >6K sq ft new house in Greenwich backcountry....and many w/resources already live in a tolerable house in Greenwich and will watch prices fall further before buying desirable land to build what they desire in a new-tech, bespoke house, not some crappy spec house on dubious land
Today's credit crisis is far worse; layoffs in NYC/Greenwich financial industry may be more severe; and many newly-built (and partially built), unsold spec houses litter Greenwich and NewCanaan....many banks haven't had time to get around to high-end foreclosures in Greenwich (FL/NV/CA/MI/OH have kept 'em busy....and the formerly rich tend to have more lawyers to delay the process).....draw your own conclusions