Perhaps you, too, should watch the reruns of the press conference today. Not that I think you'd believe anything they say. It's hard to be fair when you EXPECT everything they say to be a lie.
2.67 pounds of energy is what hit the wing.
If NASA is saying that this hit with the pressure of 2.67 pounds, they're just flat out lying. The weight of this object alone has to be in excess of 2.67 pounds. Compound that by the speed and you have far more stress than the impact of 2.67 pounds.
If this is what they put out this afternoon, I'm glad I didn't hear it.