A study came out in 2008 that attempted to capture dating preferences along racial and other lines of diversity among heterosexual pairings. The link to full text for Penn State is below as well as one quote.
http://www3.interscience.wiley.com/cgi-bin/fulltext/119395824/HTMLSTART
“We find marginally significant evidence that those subjects that grew up in a ZIP code with a larger fraction of inhabitants of a particular race are less willing to date someone from this racial group. In other words, familiarity can decrease tolerance. This result is unaffected by controlling for the average income in the ZIP code. Finally, we also find that more physically attractive people care less about the race of the partner.”
There are a few stereotypes that are verified, but also other which are left unresolved (statistically).
