This ESPN ND article had a funny comment about the "blue hairs" and the "can't stand" crowd.
"As part of the renovations, 8½ miles of wooden grandstand benches, the ones installed by Rockne in 1930, were yanked out. Much of that redwood was recycled and reworked into the stadium elsewhere, while the remainder is being sold as souvenirs. The new seating is vinyl-wrapped and widened for more hip and legroom.
"We gave them more comfortable seats, but we've also specifically instructed our fans that it's OK to stand and cheer and not to complain when others do it," a Notre Dame Stadium usher explained at halftime of the Stanford game. "One older gentleman told me he got a new seat but now he never uses it. He always stands up to support the team. So he says when he gets home he sits on the old wooden seat he bought."
The usher was asked, so, what made him finally start standing up? She shouted back "Ian Book!""
Notre Dame turnaround spurred by modernization of program