Yeah, but it's understandable because not many people played Peace Walker. I remember Brad thought the game HAD to be played co-op-- he couldn't beat the first tank boss because he was running out of ammo. What he didn't realize was there was a supply drop mechanic in that game.
On DLC (another podcast), Jeff Cannata was surprised and amazed at all the base building stuff in MGS5 and how it was a leap over previous games, and his cohost, Christian Spicer (Peace Walker lover), burst his bubble when he told him it was in PW and even PO to a lesser extent.