Jared Allen had 15.5 sacks last year in 12 games for the Chiefs, just for anyone who didnt know.
And the reason he makes so much of a difference is because he was the only d-lineman the chiefs had and he looked pretty impressive. Now imagine he is playing next to two of the better DT in the league. Someone's gotta be doubled, and then still one of the three can bust through the line. This then helps out the secondary, because teams wont be able to send five/four guys out to catch a pass, because teams will have to keep an extra tightend or fullback to help protect. And I think Winfield is a top 10 corner in the league. The Vikes lost nothing last year and they were good, now they get a top 5 pass rusher. But who knows?