A days experience cannot be termed as Constant.
Those are one off good experience.
.
Even I have travelled in Darjeeling Mail on August 17th 2014 when it took 62 mins from NJP to Kishanganj departing at 8pm. Admin Kanishka Mitra was with me onboard.
That...
more... doesn't mean DJ's average speed is more than Shatabdi's.