No, not involved in Admissions. But I know plenty of people on the AdCom at various med schools (OK, plenty = 6 at 4 different schools).
I applied, unsuccessfully, in 03 and refused to use the disadvantaged status and essay space (my pre-med advisor told me this would only help me, a close friend on the AdCom at one of the UCs said that many on the AdCom scoff when they see it b/c most of the time it's frivolous). Hindsight being 20/20, I was pretty stupid.
AMCAS is kind of funny-- you only have so much space to tell your story, and if a significant part of your story (in my case) consists of a severe illness AND financial trouble that adversely affected your education, then it really stinks if choose to use only the main personal statement to explain this. So, for my re-application this year, I used the personal statement to focus a little on my story (mentioned the illness but did not go into detail, as it was a major turning point in my path to medicine) and a lot on why I fit medicine. Then I was able to use the disadvantaged essay to explain the course of the illness, how it affected my grades (you gotta explain these things!!), and how I have overcome it and proved how good of a student I really am and why I will do well in med school.
I worried... I didn't want to sound like a whiny @ss because so many people in the world have it so much harder than I did/do. But I did understand how the disadvantaged essay would help give AdComs a better picture of why some of my GPA was low and recent stuff was so different. I wasn't farting around and partying... I was most often found lying on the floor or trying like heck to work and pay for school. Sure, you can explain it all better when you get to an interview, but AMCAS is tough to interpret anyway... make good use of the essay sections. Be concise.
BTW-- I got around feeling like a whiny baby ("waaaah, I'm sick and can't go to class, waaaaaah") by just telling the story like you'd explain a case to another physician. Just the facts, not dwelling on the negative for long, and then making a happy ending with the resolution. "Yeah, crap happens to people, but look, I got through it and I just wanted you to know about it in case you were wondering how an honors student could drop down below a 3.0 and then drop out of school completely.... and then come back later and think they ought to be going to med school!"
Anyway, PM me if you want more info. I went through a lot of internal and external debate over this issue...
FDoRoML