They(Beam) Infact buy Bandwidth from both Airtel and Tata. Their Routing is pretty awesome. I Have a Friend who uses Airtel broadband and Gets High Pings within India and Also to European Servers and the ping is almost high every time and he complains Airtel Route changes every now and then.- Because of the Fiber Technology I get some 20% less pings Compared to Reliance ADSL and 40% less Than Airtel ADSL.
i m sure not much pings are lost in adsl compared to optical fibre..difference can be 40 or 50 ms but not 100 ms...i hav airtel i get 10 ms from delhi that itself minimises the ping loss from my isp exchange to my home...now for foreign servers i dunno how routing is done ..it sux
I have used all the connections From worst pings to best Airtel --> Reliance --> Beam
Beam is the best in terms of pings, Reliance is also pretty good even with online gaming, Airtel sadly these days sucks bad used to be decent about 3 years ago, with BSNL broadband ADSL connections its like a yo-yo fluctuates a lot but I would rate them in bad.