My issue is not any one thing; I've had throttling from the new release through Firefox, eMule, PlanetSide 2 and even Battlefield 3; all worked fine before the upgrade. We've also performed a line check with our broadband provider just now, and they say the exchange is working properly... normally our download speed is 6 of an 8Mb connection, but since the new release we're lucky to get 30Kb!
The only common denominator is Avast 2014. I hope the issues are corrected soon.