Blizz PR out right lying?

[BoddoZerg]

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You know copying characters over to the Test server is using the same service, right?  You should also know that people keep copying the same characters over and over so that they have extra money on the Test servers.
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I would guess that this is the crux of the problem. They are not lying, merely overgeneralizing. People are copying way too many characters to the test servers. It's possible that this traffic goes through the same server as do "legitimate" transfers from high-population to low-population servers - so it's overloading all transfers.

You really have to wonder at the wisdom of Blizzard allowing people to multi-copy their characters though. Surely the sheer excessive number of characters transferred over to the test server is responsible for some of the stability issues it's been having.