they will no doubt blame the calibration of the fuel flow instrumentation.
When I bought LUCY I knew what the boat was like , the USN bought them like cookies so I sent a surveyor , rather than fly to Maine in Feb.
His report was enough for me to purchase her but the performance numbers were fantastic !!!
The RPM / speed was hard to believe , when asked the surveyor admitted his GPS was mistakenly was in klicks , not NM . OOOOPS
Sadly the performance is just normal, not world beating.