It looks like the excuse they are making (article comments section) is they haven't finished testing Ryzen 1600 and 1400 yet. Which I guess is a valid reason, but it kind of makes them a dinosaur when everyone and their mother has already published full reviews (many of them in depth). Even a site as glacially slow (sometimes, and usually for good reason, of course) as AnandTech wouldn't make an all-Intel recommendation list this long after the Ryzen launch.
They give other reasons as well, but I think they key problem here is in all the parameters they set. When you go purely by 100% gaming performance, don't take into account future gains from having more cores/threads, and ignore other costs (motherboard, HSF), there's enough reason to defend their position. But for a real-world guide where you are talking to a mix of gamers - many, I assume, would want to keep their CPUs for a few years, and likely occasionally do other things than just game - the Ryzen 1600 at least deserves a spot in the list for the best value going forward.
If it was just a pick of the top-performer gaming CPU I have no issues with them choosing the i7-7700K.