Anyone who's ever watched a football game knows that even the TINIEST thing can turn the game one way or another (unconscious head out of bounds anyone?). I don't care if the taping helped them one percent. That one percent could easily be the difference in winning a game. Even if that game isn't a super bowl, it could help them advance to the super bowl, or gain better playoff seeding.
Think about their first super bowl. So many individual plays that season could have derailed their chance to win the super bowl. Who's to say the taping didn't aid them enough to stay alive?