I got the strat guide that came around the time that the game did. It sounds like the version the Turk is talking about. It completely misses some things, like how to get some of the unique weapons when you return to the Shin-Ra tower.

Then again, the original FFVI guide (back when it was called FFIII) had similar problems.

You can get anything that they missed online, but that defeats the purpose of having the guide, as witnessed by FFIX's.