I received my Hyperflow this week.
48 sec to pump the first liter of tap water (from dry filter to 1 full liter)
26 sec for the 2nd liter wet.
7.4 appears to be the minimum weight of just the pump and the inlet tube and pick up. I will have to see how it works on the next family trip.
Here are some pics of the components and weights.
Inlet hose and pickup