throughput and latency are different measures.

Games usually live in the realm of latency.

That begs the question, what is the latency, and what kind of feature would you anticipate this could be useful for?

Synchronization primitives AFAIK don't need to transfer huge amounts of data in a short time. One bit for every "okay" signal would suffice. At the given speed you can perform 8 million syncs per second between two threads.

who cares, it's not like you're going to use it to send textures from one thread to another