An ex-mentor turned FIRST judge told me that, during a pre-regional judges meeting, FIRST told the judging staff that they were going to hear a whole lot of "our robot is 100% student built" as they made their rounds. This was followed by a directive that this does not matter and should not play into a team deserving any awards over a team that was 100% engineer built. He was surprised to hear that from FIRST and so was I when he told me about it.
Our team is in a constant state of change. 5 years ago when I first became my team's coach, we had a very overpowering mentor that designed, built, and programmed the robot. Our team more or less revolted against this and we had to make a really tough decision to get away from utilizing his knowledge and skills at all. For two years after that, we had students who were all of knowledgeable enough, interested enough, and capable enough that they could do everything themselves. All the while, we had a couple of underclassmen joining our "club" not team (see
THIS THREAD) who were maybe into electrical and programming more than using tools and machining equipment. Today, these students are upperclassmen who require our mentor staff to do the majority of the build, at least the mast/arm portion of
our machine, and then they (students) wire and program. Incidentally, we have some current Freshmen who are incredibly motivated and apt enough with tools and ready to take things over so we are planning now for a more student-built machine in the coming seasons. It's a constant evolution and whichever state we're in during any given season, the students who are in FIRST for the right reasons still take away knowledge, experience, and a desire to pursue engineering.
Basically, it just doesn't matter.