I believe UA coaches put something similar up after the 2009 SECCG and Sugar Bowl losses. Seems to have worked out OK.
Hate to bust your bubble, but this is a pretty standard ploy. The relative motivational quotient is minimal.
You give it all the credit in the world when it works, but for about six years straight the motivational posters Bama coaches put up were nothing but wads of toilet paper.
This is a classic case of crowing your ass off when something comes to fruition, despite the fact that you were wrong 427 times prior.
How'd it work out when they plastered posters all over the wall to prevent the thumb from being feared? Not so okay, huh? Crapshoot.
But if Bama wins next season, I'm prepared to be reminded of how well this particular sheet of paper worked.