The new NFL: TIGHT END RUN AMUK

[Lords of Scythia]

I thought it was only the Seahawks that were getting burned by tight ends. Turns out it's the whole NFL! The flex gets them lined up against defensive backs who can't defend them. More and more of the top receivers are tight ends, led by Gronk -- who is compared to Jerry Rice in the below article. Do the Hawks run the flex?
http://www.nytimes.com/2015/11/18/upsho ... t-end.html