Wahi to,
Agar starting date 05- 06 yrs back se ab tak dekhe to ye train except Dec Jan fog days, never gets more than 90 mins delay if major disruption not happens, then how can it become 3 hrs or more average late from inauguration date to till date?
The average must be of last 30 days, as winter season is going on, and its lateness has also increased in that.