given that the prize of the show is to have a show in Vegas for a year (or at least that use to be part of winning it all), this group winning makes sense as much as just someone singing or telling jokes. Their act, similar to a blue man group, is better suited to being a Vegas show.
They are pretty good but I was not as amazed with them as was the first couple of times I saw them. I think this picture came into view way to fast. Just my opinion.