Offshore, I'm gonna get the same results you get because P90X is a CrossFit ripoff. :) I've only been doing this 2 months and I was and still am way out of shape. I think I'm stronger but we don't measure, we just do. I'm eating better (meat and veggies, nuts and seeds, some fruit, little carb, no sugar) but I've only dropped 5 pounds. The Hub and buddies keep encouraging me, telling me that muscle weighs more than fat, lol. I hope they're right! I think I'm stronger but I KNOW I feel better! ANYTHING is better than nothing at all, which is what I was doing before. I'm also riding my bike now, so that will help. I'm not going to be able to do the running once we start that, so I need someone to teach me race-walking!!
See my new post about the workout we did today (#2) and compare that to what you are doing in any other program. I didn't get my ass kicked in 20 minutes today, it took me over 30 minutes, but it was kicked none the less.
Does P90X teach you to do kipping pull-ups? If not, you're not getting the full benefit of the energy you're expending. I'm not anywhere near to this level, just so you know. :)