Had it been somebody else, I would have pondered on the truth of the claim. But Mr. Bellard... that is another thing entirely.
My guess is that he does have certain limitations, for instance the amount of connections he can manage and so on. But I do think modern hardware can be made to perform well if you know what you are doing. There are many ways to generally implement the DSPs on a modern PC that would be fast enough.
Also, a guess is that one of the reasons DSPs are preferred is that they have a better power profile. You don't need that for testing purposes.
My guess is that he does have certain limitations, for instance the amount of connections he can manage and so on. But I do think modern hardware can be made to perform well if you know what you are doing. There are many ways to generally implement the DSPs on a modern PC that would be fast enough.
Also, a guess is that one of the reasons DSPs are preferred is that they have a better power profile. You don't need that for testing purposes.
All in all, I think it is a great project.