I might agree in some circumstances, however the two are interlinked here to some extent. I mean taking 33 hours to achieve that what is normally achieved in much less that half that time, to me that indicates a level of incompetency.
I wouldnt say that, you dont know the students personal factors, how often did the student have lessons? was it one hr a week? one a fortnight? or 3 per day?
was the instructor suited to the student?
33 hrs to solo is not abnormal. i have found the average to be around 20, some have been ready in 10, others have taken up to 60! before you all jump up and say 60! he should be doing something different, it was an older student, only flying about once every 2 to 3 weeks, fulfilling a life long dream, even so, she is now quite the competent pilot.