Hum challenge ni kar rahe bhaiya..Mr. Rastogi is challenging 12393 to be On Time at New Delhi for continuously 10 days..That's why i said to challenge 12309 first since its puntuality is rated as Excellent while 12393's is average inspite of the fact that both are equally puntual at New Delhi since last few months..There should not be difference in rating of puntuality for both trains at least in up direction..