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| Probably because this is 'hard won' information. |
Exactly, and it's of huge commercial value because the hard win is in millions of pounds spent getting it wrong.
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| I'd love to know how a Long distance minute has changed (what % went wireless vs. VoIP, etc). |
You'll never get accurate information. You can get a gut feel however. Skype is the only VoIP operator currently of any significance (if you look at pure VoIP - eg, the customer knows that the call is somehow being routed differently). Skype have 420m customers and now route 8% of the Worlds international minutes:-
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| Skype handled 33 billion cross-border minutes during 2008, a jump of 41 per cent against an industry that increased traffic by twelve per cent to 384 billion minutes, according to TeleGeography's annual report. |
http://www.theregister.co.uk/2009/03/25/skype_biggest/
You could probably chart these statistics and get a broad brush view, but you'd need to bear in mind you're only tracking a single operator (even if it's significantly more massive than all of the rest put together).