Myself and many other reallllly question that study. It was done by people with zero background or training in the hallmarks of the various intensity levels of tornado damage. Most importantly, the damage to St. John’s is easily the most intense damage to a high-rise building ever documented. It’s underpinning system was damaged beyond repair, and the building was structurally compromised to the point where it had to be demolished. That requires 200+ MPH winds to happen. Period. Any experienced damage surveyor would tell you the same. So even from a strictly engineering based POV, that study is highly questionable, and the notion that no EF5 level structure damage occurred in Joplin just isn’t true.