Been there, done that, DNS server choice, And i try never to use ISP's own DNS as they can often be flaky, makes no difference, if the akamai CDNS box that plusnet and it would seem Telefonica share along with maybe other big ISP's then we see these issues, I also believe that it is totally random as to which customers will have problems due to which content due the number of others streaming that content or numbers connected to that server, either way the akamai CDN products purchased by some isp's are run at the max or very near the bandwidth limit that they are paying for, some of the time
Yesterday I watched two different programs,using the BBC I player as short program from the coast series, which although didn't buffer it did display breaks in the audio,cdns Akamai The second was Stacey Dooley investigates :cocaine capital of the world (Peru) which played flawlessly not once did it buffer and audio was fine too, as said it's random, but the CDNS was limelight not akamai
