Sorry Pawz4me. Your first link discusses the theory that dogs broke off from wolves earlier than thought. Not that they were never part of the same evolutionary chain.
The writer is NOT a scientist per say, although she has a degree in Geology. She is a science writer. There were no references to where this information came from.
Your second link is a BLOG for crying out loud. That is NOT science, no matter what they call their blog.
A snippet from your third link:"Finally, AVSAB points out that while aggression
between both domesticated and wild animals can be related to the desire to attain higher rank and thus priority access to resources, there
are many other causes. What do you call this? Not dominance?
When two dogs meet, and the aggression arises, and a fight begins, just what are you going to call it? What is the reason for this, if not dominance?
Use of dominance in the human/dog relationship and dog training is outdated and inappropriate. See my post above for further information.
We are getting caught up in schematics.
Regardless, my dogs don't need "friends" other than their own pack members, and they are not allowed to do meet and greet with strange dogs for the reasons I have outlined here earlier.
Everyone has their own opinions, this is mine.