I went on a job interview that went well, and I found myself hesitating to say that it did because of jinxing.
So, obviously, now I have to force myself to say it: Yes, most things in my control went well. If I were doing the interviewing, I'd give a thumbs up. But as a result of being on the other side, I know everyone looks for different things and perceives things differently, so interview answers I feel were good may not be viewed as good to everyone.
That said, no outcome changes how well you did what you could. That will always stand.