Just to provide a remarkable transfer experiment at Delhi T3 last December.
We had a UL flight transferring to JL30. There were several passengers escorted away from the flight due to quarrel at CMB. So the transfer time is <1h30 due to the delay.
Upon arrival, an agent was waiting for us at the door and guided us all the way through the airport. The security queue at the transfer is quite long, but the agent managed to let us jump the queue. Eventually we even had ~20 mins at the lounge before boarding the flight.
I suppose the agents were from JL as they even have a whatsapp group called "JL30 working group" on their phone.