I am guessing this effects all users and not just telecom but I have been noticing sometimes some really stupid load times on some sites and at times its like the browser is hanging at random times. I found that this was being caused by waiting for 'cdn.optimizely.com' , a google search turned up the following link , I used it on Engadget one of the sites I found was being effected and bingo no more problems and instant load.
https://www.optimizely.com/opt_out

Hope this helps anybody else out that has random slow load times on certain sites.