I only know about WoW servers tbh. But yeah European servers usually go down between 3AM and 5AM CET Wednesdays, while Murrikan servers (I can only assume) go down at similar times EST/PST.
If you think about it, if the European servers went down with the American servers at, let's say, 3AM EST. That means they'd be down at 9AM for most of Europe. Which would piss off the unemployed/poorly so can't work today WoW players. And vice versa. If Murrikan servers went down with the European servers at 3AM CET, they would be down at 7PM on the West coast and 10PM on the East coast. Which would piss alot more people off.
---------- Post added 2012-06-12 at 04:10 PM ----------
Sum1 is arguing wit meh?!
BRING IT ON!!!