Agreed, and they failed to compare their analysis of various computer process times (cache, memory, hard disk, network, etc.) to various human component times, starting with a single neural pulse. On the order of milliseconds, and as you say we can see many of them, simultaneously and serially, when we speak. We don't know how long it will take a spontaneously-arising artificial intelligence to create a thought, retrieve its memories, consider them, observe surroundings, etc., but we can assume it's at least some collection of nanosecond cpu cycles, not a single one; some collection of data fetches, not just one.