I got a demo of this two years ago, and honestly I don't think it matters that they aren't sharing these numbers. Any company that is going to consider this is going to want to benchmark it on their own models and systems, and as long as Cerebras allows that they aren't going to have trouble finding customers (assuming their claims line up with reality).

Even if that doesn't work out most of the people on these time have built companies that were acquired by either AMD or another chip maker.