I was thinking the same thing. It makes me skeptical of the "6D Low Light performance" claim. That will remain to be seen. However I own a G16 and I have to say some of my best photos have come from that little camera I believe because of the better DIGIC6 processor - also used by the 7DII so perhaps we will see some VERY nice Image Quality.
I wait to hear from actual users what the low-light performance really is. Looking forward to an actual 6D/7DII comparison on that topic.
I don't think anyone claimed "6D low light performance". They referred to 6D low light sensitivity as for the -3 EV AF.