I play on US servers, gave up on EU one after I had problems with my two main characters and GOA took too long to fix (still haven't as far as I'm aware.)
I'm also probably going to play off and on for a while and didn't want the same problems with WAR as I faced on GOA's DAOC servers. Mythic are using the same character transfer system as GOA but they've been far more pro-active in promoting it and opening it up. They'll also manage server merging much better. In short I gave GOA a chance and was let down once too often, unable to use my two main characters as they're not in any zone and GOA's support completely let me down.
Lag isn't an issue with the US servers, if anything it's usually better due to GOA's regular routing issues with UK based ISPs (you'll know about that if you played DAOC).
I really enjoy Warhammer, liked WoW and it is quite a different game but it's a nice change. I play on Red eye mountain on Destro, usually find it quiet around 1pm - 7pm UK time due to timezones, but outside that it's actually pretty busy, especially ORVR T1/T2 (haven't got to T3 yet). The only thing to bear in mind is that maintenance on US servers is offset and usually I find means they're down on maintenance days from 5-9pm UK, which can be a pain. Although their estimated maintenance times are always generous and they're almost always back up by 7pm. Must admit it doesn't interfere with my gaming much.
If you're wanting to try the US servers you'll have to use "hidemyip", get it to give you a US IP address then order from the EA or similar site as it's not "allowed" outside of the US. Oddly though you can pay the subs from your UK based IP.. so they're not that fussed!
Alternatively (and this only applies to Shaye87) drop me an e-mail in trust, I've a spare CDKEY that I was sent me for the US servers by mistake, sent two when I paid for one. I'll happily e-mail you it and post you a copy of the US client install (or you can try to get it off torrent), can't promise it'll work and they haven't issued it to someone else but I've a feeling it'll be fine.
