I think the point he's making is that a lot of the UI elements don't quite look or feel right, kind of like how a lot of Adobe CS apps have "native" dialogues full of weird mistakes.

Sometimes little look and feel things have a huge impact on how people react to apps: I remember (and I could be wrong, it's been a while) pretty much instantly not liking Opera on OS X when I first tried it since it had smooth scrolling turned on by default, something almost no Cocoa apps do.

Oh, yes, I'm just pointing out that they changed that because people who have seen opera recently might be confused by the comment.