I have been working for various Apple Dealers for loger than I care to remember (system 6.0.3) and as with all my jobs only one company sent me for training.
Its a shame as I now work with both HP and Apple and my microsoft training has been paid for by HP shame on you Apple
All my Unix knowledge is self taught and typical UK Apple even if I wanted training on Servers etc they are generaly an OS behind.
Despite rubbish support from Apple I still prefer setting up an OS X mail server than an exchange(get home for tea with OS X)