Peterson didnt break.
He did indeed give up less than their 2nd round pick, just like he said. Swapping picks in the 5th is a fairly minor difference, but its still better for KC than just giving up their 2nd straight up for Pat. Especially when a lot of us were hoping for their 2nd an a late round pick to boot.
Also, Saban has said all along that he wouldnt accept anything less than a 2nd round pick for Pat. Dropping 10-20 spots in the 5th makes the deal less than KC's 2nd round pick, but value-wise its still probably somewhere in the 2nd.
All in all its probably a good deal for both teams, but I think KC came out just a little bit ahead of us.