The average speed of your imaginary train is 74 KMPH or so. This is indeed awesome but is it practical, as the two other superfasts on this route (22992 and 22958) have average speeds of 47 and 52. As Aditya says ' it is too fast for a single line''. this link gives the details incl average speeds of all trains on Verval-Rajkot section:
/search/2123/0/1570 . Think my point over and try and find out what other people think. I maybe off the mark :)