I just posted a new run of the Gamma L pump.
Bottom line : near 0 bar the pump delivers 1.83 times the "faceplate" value of 32l/hr : using Penon's formula the output would be 0.94 MW.
(Note : and my old pump seems to be under-performing compared Prominent's curves between 1 and 2 bar).
Bottom line : the Gammas could deliver Penon's flow values.
For everyone watching. On the Gamma pump thread I have been challenging the overall conclusion that Alan Flecher mentions here. On the evidence so far the Gammas seem capable of delivering only about 2/3 of the output Penon claims.