Grit is definitely not overrated. Grit wins games, and a lot of them. If it wasn't for grit, the teams with the most talent would always win every game, and we'd might as well crown the team with the most college recruits as state champ each year. But that's not how it goes.
Grit matters more than talent. It allows you yo punch well above your weight class. Grit matters almost as mug as coaching does. You will see grit in action week one against a Withrow team that most likely has more talent on paper, definitely more speed, but Withrow's lack of grit will work in Elder's favor. I don't expect the game to be all that close.