I'd be surprised if that ever happened here.
People never demand their money back after getting cold feet. Well almost never.
http://www.theglobeandmail.com/news/bri ... cle624044/
http://www.nytimes.com/2007/05/26/us/26 ... d=all&_r=0
China's different in that they are demanding their money back because real estate never goes down. (Can't find the link but this happened in North America too when prices that weren't supposed to fall fell.)