Such a Mind would experience a million fold time dilation, or an entire subjective year every thirty seconds.

five minutes would correspond to an unimaginable decade of subjective time for an acceleration level 6 hyperintelligence.

architectural optimizations over the brain and higher clock rates could lead to acceleration level 9 hyperintelligences.

Acceleration level 9 stretches the limits of human imagination. It's difficult to conceive of an intelligence that experiences around 30 years in just one second, or a billion subjective years for every sidereal year.

Self-parody, or parody?

I agree that a pair of sped up minds will want between them a lower latency and higher bandwidth connection to experience the same ratio of thinking to communication that we're used to. I agree that the speed of light means that low latency requires close proximity.