Yes, I'm experiencing the same issues. I know it's not my computer either. If I can run crysis at almost all maximum settings, this game shouldn't be an issue. If I leave space, forget it. The server-side lag is woeful. I'm debating whether or not to buy the lifetime sub based on whether they fix this lag or not.
I understand it's open beta and that the game isn't fixed. I don't know what they can do to fix this issue, but it's close to gamebreaking for me. Hopefully they get it fixed in the next two weeks.
This IS gamebreaking for me. If I can't even quest, I can't level, and that certainly means I won't be able to participate in endgame stuff.
I KNOW it's just a beta and nothing's complete, but if cryptic devs that were trolling the forums could drop lines now and then addressing particular issues as ''going to be fixed before the 29th'', it would go a loooong way to appease the players.