When I woke up this morning I was greeted to two things: a fist full of WoW news to report on, and my daily dose of MythBusters. Interestingly I found that our chummy Blizzard PTR forum poster Hortus has taken up dispelling some myths of his own. This myth is so epic that I think it would make for a good computer nerd edition of MythBusters.
The myth is this: every time the PTR goes up, my server slows down.
I play mainly in two different servers, Anvilmar and Eldre'Thalas. I've heard it claimed often enough on both servers that the PTR seriously effects stability. Most people claim this is because the PTR and the server hardware are on the same "rack." Most servers are just a small gray box with a few blinking lights on the front of them, and lots of connection ports in the back. When making a server farm, like Blizzard has scattered throughout the country, they physically put the servers in clusters, called racks (no, not that kind of cluster, well kind of, but that's beside the point).