2 billion watching royal wedding?

If you have not heard about the royal wedding yet, you must have been in the third world or at another planet.
Seems as almost every media tells totally uncritical about (over) 2 billion watching the royal wedding (live). Is it really likely that almost every third person in the world watched it? And that the royal wedding is many times bigger than both the FIFA-WC-final, Superbowl or Eurovision song contest?

Live from palace one time I was there.

But I cant find the 2 billion-claim much convincing. Even in the best broadcasting time Eurovision Song Contest is only viewed by around 120 millions in Europe. And the SuperBowl-final has an average view of 111 millions mostly in America. If the mainparts of the western world only can gather around 230 millions in best broadcasting time, where do they get the other 1,77 billions from? FIFA WC-finals is estimated to around 700 millions, and even FIFA admits thats exaggarated.
The royal wedding is propably only a big thing in the western world, than we can eliminate a couple of billions in Africa, Asia and South-America.   
And remember this wedding was sent in the worst broadcasting time, on a fridaymorning when America was sleeping, and me and the most of Europe was busy at work or school.

In reality I think the royal wedding was available to around 2 billions, but media may have misunderstood or just exaggerated it until 2 billions viewers! Pinged articles to get readers: 1, 2,3

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