I saw this article and it appears to confirm something I've often suspected:
https://www.yahoo.com/autos/ford-f-1...425369777.html
From the article: “ 'Ford added structural elements to the crew cab’s front frame to earn a good small overlap rating and a Top Safety Pick award but didn’t do the same for the extended cab,' said David Zuby, IIHS chief research officer."
They reinforced the structure in some versions, but not others? Shame on Ford, but how many others do the same?
Since they test offset and small overlap crashes only on the driver's side, do they reinforce that side and not the passenger side?