Of course, there are many western aircraft types that are known for their negative pitch during approach as well. Consider the CRJ-200, the DH8 in certain flap settings and other models (typically) without slats. Given the prevalence of such pitch values on these types, Occams Razor would rather seem to point to systemic or procedural reasons for them than to training issues affecting the entire world fleets.
is a video of an apparently normal An-24 landing that also displays a rather negative pitch during approach...