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Originally Posted by JustAnotherN00b
They cut down traffic from PoPs to network borders, which could be very important in the future should access rates increase substantially - they do make a difference, unless you have stats of bandwidth they save pem I don't think you can really comment - they cache images and can do streaming media as well, think of the savings there.
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Of course I can comment

I never said they don't make a difference - I said they arn't vital and they make less of a difference now that many sites are not static. I don't think many people use streaming media yet.
Do you have some bandwidth stats you can share with us to show one way or the other ?