Completely disagree.
I think the production on the early Bon albums is awful, especially TNT and Let There Be Rock. It's muddy and inconsistent from track to track.
Having said that, Powerage (the last Vanda/Young album from that era) is superb. Brutal guitar sound and chest-caving drums. Although, I reckon Mark Opitz (engineer) might have had a lot to do with that.
Mutt Lange picked up where Powerage left off and took their sound to another level. I don't think any of the 3 albums he produced sound 'polished' at all.
Highway To Hell through a good sound system is still one of the most powerful listening experiences in rock music, Back In Black speaks for itself and For Those About To Rock is hugely under-rated.
I'll admit Mutt wasn't afraid of piling on the cheese (Foreigner - 4, Def Leppard - Hysteria) but I thought his AC/DC output was awesome at worst.