"This last bit may explain why Intel PR sent out a last-minute “call us before you write” email to most of the press, but not SemiAccurate, after hours last night."
Ah, there it is. The comments on Guru3D also had a link to wccftech with similar comments, but they look to have censored it, its as though Guru3D is fighting showing any sources.
Quoted from: https://semiaccurate.com/2017/02/22/amds-ryzen-7-1800x-beats... (you can find it towards the end)