Well D-wave is evaluated on an optimization task. This Google thing isn’t even trying to solve a real problem. What says you can’t get some very hard to replicate random bits out of a D-wave?
If D-Wave could achieve quantum supremacy, they definitely would, and would heavily publicize it. They haven't, which gives us strong evidence that they can't right now.
Do you retract the claim Ising model problems are "extremely difficult" for classical computers? I replied with practical and theoretical considerations why it is not so.
I made no claim at all, I just stated an assumption that motivated my question. But you also misrepresent my assumption. My assumption was that the D-wave could sample from the solutions to “ising model-like problems” much more efficiently than a classical computer. A quick glance at your references gave me the impression they where about finding a single ground state / global minima of the hamiltonian. That’s a very different problem.