That article may be true about fat loss, but I notoriously avoid strength training and rely on cardio and diet to lose weight, but I know I should do it! I even have the P90X DVDs -- though I saw that the site you mentioned [ http://tumblrgym.tumblr.com/p-90-x ] has links to them online in Japan for anyone reading this who doesn't have it and wants to use it.
My friend (since Jr. High), Stacey, is a Bikini Level Bodybuilder/Competitor and MD, and offers personalized services in getting a hard body, in case you are interested. http://www.1hothapa.com Take a look at her and consider how we graduated from high school before you were born! LOL.