I don't see how you can conclude that. The i7-7700K score will be from one or two submissions, likely at high clocks. The fact that it says "@ 4 GHz" means nothing.I think your right in that they are average user scores. That said the two cpus 4790 and 6700 are so close in performance they are 'identical'.
The kaby lake one does seem a little better than the usual tiny increase though.