With Dan Zhang recently having retired from competition, I thought this would be a good time to start this thread.
To my knowledge in skating history, besides the Quadruple Lutz performed by Brandon Mroz this past season, there is only one other element that was performed first outside of international competition. However, it did not get credit from the ISU.
This element was the Throw Quadruple Salchow.
Many people are familiar with the unsuccessful attempt by Zhang/Zhang (CHN) at the 2006 Olympic Games.
However, just a few weeks before the Olympics, Zhang/Zhang landed a Throw Quadruple Salchow at the national games.
This was performed in early 2006, 18 months before Vise/Trent (USA) were credited as the first to land this element.
As many people would know from last year, Brandon Mroz (USA) landed a Quadruple Lutz jump in a minor competition held in his home rink. Despite it not being an international, ISU-sanctioned competition, he was nevertheless given credit by the ISU as the first ever to land the jump.
Many people, including myself disagreed with this somewhat rash decision by the ISU to allow non ISU-sanctioned competitions to count for international firsts in elements. Nevertheless, the ISU has set it's precedent, and now if there is video evidence, jumps done in national competition will count towards international firsts.
Now, by the ISU's own criteria, I believe Zhang/Zhang should be credited as the first to land this element. As seen in the video, it is very clear that she took off, completed 4 revolutions, and landed cleanly. There is no doubt.
But would the ISU ever re-ratify an element, so to speak?