Actually, you really have to look through the eyes of a visual judge. If 3/4 of the corps is all doing the same/similar motion and those 75% of people are doing a true jazz run, then the other quarter of the corps should follow suit. It would look absolutely ######## if those people were marching straight leg. Even if there were people marching a 6 to 5 (which I don't believe happened), then those people should match the rest of the corps, or else the whole move loses it's impact and judges would most likely dock points for that.
As for wow factor or ahhh factor, I have to say that it's those moments where the hair on the back of your neck stands up and shivers go down your spine. For me, it's those beautiful musical moments in a lot of different PR shows. Also, in Crown's ballad in '07, where the high brass had that feature, that surely wowed me!