Yes, that's an argument, you may think an overly optimistic one, that international negotiation might maximize its chance of succeeding in its objectives if the positions taken are based on evidence on which there might be some agreement around what the evidence points to. That's the simple point that's being made there.
There is certainly an argument that's made, including in the countries you've mentioned in quoting from the review, that in the past diplomacy around intellectual property has been based more upon a kind of power politics than a politics of economic reason. Given the global character of the Internet and the way that reshapes and rebalances forces in intellectual property issues, at the very least, those who are adopting international influencing strategies on these matters will be well to bear all of that in mind.
The terms of trade have changed, of course, not only in IP, but certainly including in IP.