I believe the onus is on you to back up your claim
You are thinking in terms of collaborative research, which indeed works in the way you describe. We are not however having a competition to establish the truth here. A company made some determinations and explained its reasoning. The later part was not either necessary or common, but since this happens to be a pretty open company it tends to do that sort of thing. Whether you are persuaded or not by this is irrelevant, given the economical asymmetry: they have money riding on the correctness of their determinations, you do not. Seeing how research in general costs money, your position on the matter is dubious: sure, you may be unconvinced, but no, there's no "onus" in this context. Otherwise, time, by which we mean of course the market, will tell.
No, I'm thinking in terms of basic logic. The person who makes a claim (you) has the onus of providing evidence in order to support that claim.
It's true that whether or not I'm persuaded may be of no consequence to you, but since you made the post in order to promote your business, I'm guessing persuasion was indeed a motive.
All of your efforts to dance around a quite reasonable (and harmless) request for the basis of your belief aren't lending you much credibility. If you truly don't care about that, though, carry on.