In my area jio provided 0.5Mbps but 4 months ago a new site was installed after that speeds are sky high. So same may be in delhi also or they have less number of towers connected with fiber.After seeing these jio posts i am thinking what's wrong with jio in Delhi NCR, i get average speed of 1-2 Mbps on jio in Delhi NCR.
For airtel it's 30-40 Mbps