This is such a tiresome subject.
I know teams that have all the work done by students and I know teams that have work done by the mentors and I know teams that split it up evenly. So many teams do these things so many dfferent ways and they can still be awesome right?
Last weekend at FLR there was a situation where a veteran team was openly disrespected by another tema because of this. I would never openly judge a team because of who builds the robot and to shun them is just insane.
I don't know the exact percentage on our team ( about 50/50 far as I know)but basically we just have people work on the bot to get it done and not obsess over who did what because we
all have to get the robot finished so we all are going to work towards that goal. If anyone has issue with us because of how we work on the robot that is their issue, not ours.