Sorry my friend but it is very clear, take a look at the M2 Exit exam, there are fields for the inspector to take marks away if you shift while turningAccording to the standard interpretation under the DCP (Driver Certification Program) that is not meant to be interpreted in such a black or white manner. A smooth shift with an imperceptible gap in power delivery, especially on a smaller displacement bike, should be ignored. If there's a big gap, (think straight pipes on a cruiser: brrraaap. pause. longer pause. BRAAP!) that's an error. If it's not smooth or the bike lugs, that's an error.
I agree - if you can't shift smoothly, you aren't ready. One of the things that training for this does though, is makes riders more aware of when they're shifting, so that it's only done when it really is necessary, not just because it's habit.
Left side of the test under the "turning" heading
http://temp.corvetteforum.net/c4/xtwinturbo//M_exam/m-exam.gif