I'll chime in here and add my current experience:
I was hired at "sub-level" wages and allowed to learn what I didn't know. Partly because of that, I have gone out of my way to learn as much as I can as quickly as I can.
The other part is just because I want to be excellent at my job and appreciated. I want to be the person in the office everyone is glad to see every morning. Only part of that is personality, most of it is if you make other people's jobs easier for them and that means pulling my own weight at the very least.
Being self taught, there is no reason I cannot be successful that way however, I would point out that after a certain point, the help file is no longer helpful and outside assistance of some sort is necessary. The people here are an excellent resource and, in my opinion, a rare one! I did learn more from the help file than out of the book from my local community college (I didn't go to classes, just read the book). I also got more out of an Autodesk training manual than I did from the help file. Because of those two experiences, I would love to go to an Autodesk gathering of some sort and see what I could glean from that but as far as getting my Associates locally, I am thinking that if the teacher isn't any better than the material, it may not be worth the paper it's printed on.
IMO: It depends on the training as well as the employee and the right training along with the right employee will be worth every penny. The right training with the wrong employee is pointless.