regarding unreserved passengers...majority of tkts of almost all jan shatabdis are issued by unreserved ticketing system. u stand in queue in the ur counter. say to the clerk u want a tkt of js and u ll get a tkt. you get a seat or not is not of his concern. plenty of passengers go standing all the way in pnbe hwh jan shatabdi and hwh barbil jan shatabdi...
regarding speed...plenty of superfast intercity and some normal m/e too run faster than jan shatabdi...the tag looks attractive bt is not necessarily fast...rajdhani, shatabdi, duronto stands upto their name...jan shatabdi doesnt...