The speeds would have been out by double figures, and a good airman should have noticed.
You clearly have never dealt in Airbus' system of Perf Calcs
There is no logic to the Speeds / Flap setting used... Even on 1 type, you cannot get a "feel" for what the figures should be. Try flying 3 or 4 variants, and much as I would like to be able to "gross error check" the figures, all you can do is type whatever the printer/computer spits out. Your control of the situation is checking the data input(s).
Not safe or satisfactory IMHO, but we are just the employees at the end of the chain
NoD