I have to admit to some skepticism as well, Caledonian, but it seems clear to me that it should be possible with P > .99 to make an AI which is much smarter but slower than a human brain. And even if increasing the effective intelligence goes as O(exp(N)) or worse, a Manhattan-project-style parallel-brains-in-cooperation AI is still not ruled out.
I have to admit to some skepticism as well, Caledonian, but it seems clear to me that it should be possible with P > .99 to make an AI which is much smarter but slower than a human brain. And even if increasing the effective intelligence goes as O(exp(N)) or worse, a Manhattan-project-style parallel-brains-in-cooperation AI is still not ruled out.