Specialized recall MY16 Venge ViAS S-Works and Pro level frames

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I don't see anywhere in the article where it says the brake position is the cause? 

Correct but it is only the top models with brakes attached to the seat tube that are affected. The 2017 versions have disk brakes by the look of it. The unaffected 2016 models have brakes mounted in the usual place. That's what got me wondering.