Again, once more, their is a difference between having a few moves that you do when someone is STANDING ABOVE YOU, and their being a set curriculum for ground combat (TWO people are engaged on the GROUND!! NOT one standing above the other!).
Robert has admitted that the majority of the ground stuff he does with TWO PEOPLE on the ground is drawn from BJJ, and Sambo. I assume he has trained some with guests and what not in his hometown.
Neither of what you offer is viable. It is simply people stating an opinion, not fact. EVERYONE and their brother in the CMA community is talking about adaptation and how ground fighting has "ALWAYS" been in their curriculum. That is why it has been seen in demos, and videos, and tournaments all these years
These are people simply trying to mask their fear of the unknown with a veil of a false reality.
I have a foot in both worlds, but I tell you something... the grappling / BJJ / Sambo / Judo community thinks that CMArtists are a ****ing joke! And frankly it has all been self perpetuated. We have done this to ourselves.
Have some dignity guys. It is okay to let go of the ego and admit "your" style does not have everything. Grapplers admit it. Thai Boxers admit. Western Boxers admit it. Why can't the CMA community as a whole admit it?
Cheers
Jake