By reading the comments I get the feeling that you think Germantown is a group of huge, slow football players.
Go ask Whitehaven, Bolton, Bartlett, Collierville, etc. and get their opinion regarding speed.
They have speed and quickness where it counts. They also have a very good QB who does not make mistakes. Combine this with a defense that has not given up the big play and you see why they are in the Championship game.
Also, everyone fails to remember that Jake Kasser was nominated for Mr. Football because he is a football player. No he is not the fastest guy on the field, but he knows how to make plays and he loves to hit.
The bottom line will come down to this - whoever controls field position and does not turn the ball over will probably win this game. Just because Riverdale is from Middle TN does not guarantee them a win for just showing up for the game, ask Franklin about that.