That's interesting Marcus. Although there are different schools of thought I'm personally in favour of fast guiding corrections. Except of course if you use AO so it doesn't matter, which you plan to do anyway
In my case (no AO) I typically guide at ~2 Hz (0.5s), and then only increase the guide exposure if the graph is not behaving well (this depends on seeing and wind), but always keep it between 0.5s and 1.5s.
Or put another way, if the guide star has moved then I don't want to wait, say, 5 seconds for an exposure before corrections are sent to the mount.