Could be but what i said is from my experience which i can't deny.
Though it stopped at Gaya and i asked the PC Staff as to why it had stopped at gaya, he told me they needed to load Food items from Gaya.
I travelled in this train 2 yrs back and now probably the stop has been given away.
@ UG. Look...
more... at the timnigs of 2381 Poorva express and you can estimate how much Slack timings are there in 2319 AGC Express.
HOWRAH JN 08:20
ASANSOL JN 11:00 - 11:05
DHANBAD JN 11:58 - 12:06
PARASNATH 12:41 - 12:42
KODERMA 1 13:32 - 13:33
GAYA JN 1 14:50 - 14:55.
Clear 15 mins Slack timing.Poorva takes 2hrs 40 mins from DHH to Gaya while when i travelled (it was 2329 then) , it took 2hrs 30 mins(+/- 3 mins) to reach Gaya which is nothing Amazing at all.