AoC (Europe): 27ms - 1249ms
AoC (Testlive): 110ms - 143ms
TSW: 105ms - 143ms
My location: Oslo
I have made detailed numbers and times for every single evening/night that I've been in-game in these two games during the last eight days, so the mentioned results here should be very representative of my experience. It should be noted that the 28ms in AoC (EU) can be seen frequently, but only in very short bursts. Equally, the high numbers (up to 1249ms) happen only very rarely, and when it happens, it is only for a very brief spike. Normally AoC (EU) sits at 58ms-72ms on average all the time.
TSW is a lot more stable, the indicated range here (105-143ms) is very consistent. The game almost always sits within the 110-125ms range, which is really smooth. No sudden spikes in TSW.
The TSW numbers are in line with numbers I had when I used played Lord of the Rings Online previously. As some of you may know, there were LotRO servers physically placed in Europe (a data center in the Netherlands), and back then, I always faced a comfortable 50ms-70ms. The servers were later shut down and European players from then on had to play on servers placed in Boston. I remember hot-headed arguments on the LotRO forums about how bad this would be for the European player base and that gameplay would no longer be good for them. People freaked out and imagined themselves a nasty experience. I don't play LotRO any more, as I felt that it got too grindy and dumbed down after the F2P transition, but I played LotRO up until recently at a stable 115ms-130ms. By now I have handed over the account to someone else, who can confirm the same numbers as accurate as of today. No difference to be noted at all from the 50-70ms I had on the European servers. The only difference was during the weeks following the transition from Europe to Boston: There was a noticeable lag, with burst spikes, ranging from 150ms to well beyond 400ms (which was not very playable). The tech team at Turbine managed to fix things after a while, and things were nice and smooth ever since.
That said, there are games that give me better numbers... WoW (European based servers) currently give me a constant 25ms-40ms. And I have played games where the numbers sit rather firmly at 200-250ms, and even that is quite okay (more than 300ms is getting noticeable though).
So if TSW is any indication on where AoC's network performance is headed, I think things will look rather nice. No reason to worry.