He said the system not the games. I'm not sure why you're equating them to mean the same thing. A game can be based on an average system and still be above average because of other aspects. For example, most people would say PS:T was great because of the writing and characters.
Writing and characters inspired by D&D.
And yes, they mentioned systems, but then went on about dragons "and all that shit" being the actual thing that was 'boring', hence the confusion, because dragons and "all that shit" has nothing to do with systems.
Would PST have been just as 'good' a game with a different system? We don't know, but we do know it was D&D, through and through.
Saying D&D is 'average' as a system is about as pointlessly subjective and reductive as you can get. Especially if you actually care about writing and characters so much above systems. You don't need any system at all just to crate words and characters.
I mean, if we actually want to discuss the topic that was risen here as a discussion point, then, by all means, let's have some actual reasons why D&D is 'average', or shall we all just sit here and bow down to someone who "has probably played more D&D than anyone here" (LOL) as if their word is somehow the infallible truth?
I think the PoE setting is better than, say, Dragon Age, which has almost no creative inspiration not borrowed from other sources. They did try to do something a bit different with 2, and it sold like crap.
Because it was crap. And, no, the setting wasn't 'something different'. Or no different to anything else that's slightly different to something else [basically everything].