Earthquakes in Haiti, Chile and China have left hundreds of thousands dead. However, if you compare the magnitude of each quake, the more developed the country, despite the larger magnitude the earthquake, the lesser death toll results. Smaller earthquakes in poor countries can have a huge death toll, such as Haiti. China's recent earthquake was 6.9, and killed at least 760, but that will probably rise.
Sources: http://news.bbc.co.uk/2/hi/europe/8623534.stm,http://news.bbc.co.uk/2/hi/asia-pacific/8621278.stm,http://www.usgs.gov/newsroom/article.asp?ID=2439&from=rss_home