Sorry, but I disagree.
The propagator has 1/4 the cells that the activator pack has.
If you can accept that an activator pack can pitch 5g of 1.060 wort (and I believe that is under-pitching), then the propagator would be able to pitch about 1.25 gallons at the same pitching rate.
There are only 10 types of people in this world. Those that understand binary, and those that don't.