This has been making the rounds on Facebook and I'd like to verify the authenticity of it but a quick Google search hasn't helped. I feel like it's trying to correlate winning percentage when leading at halftime but I don't have the time to articulate the numbers game-by-game. Losing after leading big at the half (let's say 10 points in the Jay Gruden era) definitely seems like a trend for Gruden though.
I also believe D.Jax when he says the Redskins lack killer instinct. And that reflects on Jay Gruden too. It's one reason why I'm in favor of moving on unless we somehow make the playoffs this year.