If you are referring to the memory usage comparison at [1], the latest G-WAN version now uses less RAM than nginx.
[1]http://nbonvin.wordpress.com/2011/03/24/serving-small-static...
[1]http://nbonvin.wordpress.com/2011/03/24/serving-small-static...
[1]http://nbonvin.wordpress.com/2011/03/24/serving-small-static...