Blizzard has major server datacenters in L.A, Phoenix, Chicago and New York. Its safe to assume the D3 servers will be in these datacenters. You can ping any random game server hosted in those cities to give you an idea.
This will be dusted, spider covered, making horrible sounds when coming alive P1 - P2 with GF2MX400 and 256ram , untouched for ages, in creepy basement below sewers and fish market, walls covered with moss, and you know? they will be lagging on day 1 of release as hell :)
this is how i imagine the servers in dusseldorf after horrible lags on wow realms
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And a sudden plunge in the sullen swell. Ten fathoms deep on the road to hell...