they cannot do that as per regulations on wired connections. it's more like a designer was assigned to an mba to make an image for the footer of the page. and he just made up things and got that image made. explains the vowifi bullshit as well.
i mean sure, there is always a possibility of network congestion that would cause slowdowns. it happens on all networks. it's not like airtel would boost your speeds for 30 minutes if they were forced to slow down your connection for 30 minutes.