see ill ansr one by one.. firstly that people who have to travel at any cost have the best option of premiums coz they can book tickets in them easily and the biggest plus point is that their priority is not less than any express or sf train on that route..
second varun sir it was clear that a dd would run some day from lucknow be it ljn or lko coz after running so many specials and ac special then even there remains waiting list..so it was quite clear a lko ndls dd...why ndls?? coz if u see availability in trains of gkp to ljn and ndls to lko or vice versa u will not be able to book in them...
more... within 20 to 30 days(those which people prefer and are punctual) thats why this dd is even said to be the big hit in all dds of INDIAN RAILWAY...