I disagree a bit. Had Yuka's most difficult jump been a 3T she would never have gotten those kind of marks. Yes she did everything well but there's a lot of skaters who do everything well but couldn't pull the marks because they didn't have the most difficult triples. So in that sense a failed 3Z did factor into the scoring and allowed her to score higher than probably a successful 3T would have. (Witt completed a 3T-2T and a clean program but finished one spot ahead of Yuka in the SP)
6 of the judges gave Witt a higher tech score, with a couple of her spins and her 2F being slightly weaker than Yuka's. The 3T-2Toe was clearly given more credit than the 1Z.
Anyway, IF what you are saying is true, it denotes something else altogether: reputation judging. It's not judges giving credit for failed jumps.