Yes, that’s the average flow rate during the station run, it’s calculated by recording the pulse count at the beginning of the station run, and at the end, then the difference between them multiplied by the flow rate. So if there are multiple zones running at the same time, this will only show the total flow rate, not individual zone (for the obvious reason that it doesn’t know the distribution of the flow rate among simultaneous zones).
There is also the real-time flow rate which you can poll. The real-time flow rate uses a (by default) 30-seconds window to calculate flow rate. This is different from how the station run log is calculated, as described above.