I didn't hear all the performances, so i can't compare, but i did hear some of Wunder's playing and it is a bit puzzling that he didn't do better.
I somehow doubth they'd vote someone out just because of some wrong notes, it sounds like an excuse to me!
If it really is true, then i really think that Pianocompetitions has gone past the limit. It's a music competition, not a typing competition!
Competitions in music has always been a problem though, i think it would be better if the judges couldn't see the performers and never knew who was playing. Only judge the music that was played.
But, it has to be a show too, so there we are...