The source was his campus number since he didn't run Combine or Pro-Day. It's not wrong.
That being said, Being a deep threat isn't just about speed. Jerry Rice (he of the 4.8 speed) can tell you that.
I said it in the game day thread. I said it last year. I mentioned it in my off-season review. Koppen isn't able to handle the NTs in the NFL. He's a great veteran player, but his skills have slipped.
This is the 3rd game in a row where a NT has just man-handled him and he had no help. And that can only be his fault. Either because he couldn't handle the guy or because he didn't call the right protection.
Either way, Vollmer will be the starting LT next year and the Pats will likely have a new center.