Is it so tough to follow your own words. You told him, official TT or IRCTC TT is followed. He replied to the same, saying that trains follow NTES.
Now you're talking about WTT and PTT. So, should we update WTT here, because that's what a train follows.
While...
more... I agree NTES data has discrepancies, the article you shared as a 'proof' talks mostly about real time train data and the coach information display. What that has to do with the TT. And if it has to do something, the article also mentions something about, 'linking every other data provisions to NTES'.