Yeah, I remember illiterates in both AA and the rehab program I did through Kaiser. A lot of people just seemed really nervous when it was their turn to read, which is understandable (I was nervous too but probably better at hiding it). I generally wasn't a big fan of AA (just something I had to do to get my disability check) so I never really did any mingling, though many folks in my Kaiser group really took to it and made a bunch of friends and totally bought into the AA lifestyle and seemed quite happy.
But the main appeal for me was the stories- I heard shit in those rooms that sounded like they were right out of a Scorsese or Tarantino movie. Think I may have mentioned this here before but the best story I ever heard was from a MUNI driver in my Kaiser group (there were actually a couple MUNI drivers IIRC- no surprise there) who said he went to score coke at a dealer's house which was full of random "associates" of the dealer's and when he went to go to the bathroom, someone came to rob the place and wound up shooting everyone else there (guess they were in too much of a rush to check the bathroom). Insane story and you could tell from the way the guy told it (hushed and haunted, somewhat detached) that it was 100% true.