If you were part of Race Blogs of LTT-NZM AC during the period when it used to get WAP-4s, then you would observe that on most occasions the train would go through over 2 hours having an average speed of over 100 km/hr. Even in BSL-ET section, I remember the train making up one-hour delay during one run, going at over 100 km/hr for over 3 hours.