"Internet users 'could suffer brownouts due to YouTube and iPlayer'
Internet users will endure slower and less reliable connections from next year as websites such as YouTube and the BBC's iPlayer cause online traffic to double, experts warn."

(See http://www.telegraph.co.uk/scienceandtechnology/technology/technologynew...)

Anything with the phrase "experts warn" in it is IMHO to be taken with large heaps of salt!!