i have the shotgun news issue where david fortier did the torture test on AR mags, the lancers held up the best overall
Here are 2 links with some of the info from the article you mentioned:
http://www.ar15.com/forums/topic.html?b=3&f=17&t=468826&page=1
http://accurateshooter.wordpress.com/2009/11/25/ar15-magazine-torture-test-in-shotgun-news/