Guesting
I have never seen Arenanet ever state anything as such.
I’m sure “some guy” is an official Arenanet representative with top-secret insider information, so clearly this information is completely and undeniably accurate.
All kidding aside, as eisberg said, they have never said anything of the sort. More likely (and this is just a guess) there were issues with how guesting worked and how stable it was going to be with everyone criss-crossing servers like crazy, and they wanted to get it working well. But, again, that’s just a guess.
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