the whole premium thing is debatable ..for todays Sunday morning departures ...from SC to JHS in 3ac ( Rajdhani , ypr duronto , suvidha ) had combined 600+ seats vacant in 3ac and around 250 in 2ac...while AP had none available and KSK had none ...even though it is off season ..i am sure , if the cost was same as that of SF ...you would not have these many empty seats in these trains ...runing ypr duronto with 400+ vacant seats is sheer nonsense ...