Mishraji, This is a while back, when BSB-AYC-LKO was still un electrified, I was travelling in 13307, I had got down in JNU to have Jaunpuri Chai, I was actually shocked at the condition of JNU! Given LKO division's glowing reputations, I am pretty sure things are just the same.
I remember, everybody used to take the Mickey out the 8 BG guy, I mean his obsession with finding how many broad guages lines was ridiculous, but his statements regarding JNU's potential to fill up trains. Like you just said, trains coming from GCT/BUI etc get jam packed from JNU onwards!