Captain Sled,
Under some circumstances, it will, or maybe not
No argument from me.
I was not referring to certification status of said aircraft, generally speaking, two pilots onboard, two hours fuel, capital city airport, ISA + 10 with ten knots of head wind, the "general training environment", most, if not all aircraft will have some form of positive performance when correctly flown, which as a part of the training environment offers some really good lessons to the trainee pilot. ( poorly described by me, but that was my general concept )
A C402B, with fours hours fuel, 6 POB at YBMA on a 42 degree day, from my experience, does not climb...........................
Up-in-the-air:
The word "recommended" and "should" does not mandate a requirement ( different to "must").
The words: can, should, must, recommended, prohibited etc etc all have very different meanings.
Try reading the Jepps, looking very closely at these words. It changes to meaning of many things quite considerably.