The game promises on its front page a single persistent server. However, 80%+ support of something even in a forum poll is... sufficient support to justify changing any front page promises. And I say that as someone opposed to splitting the servers.
I believe though, all good decisions should be based upon data. So here is how I would suggest you split the servers if you do it:
Wait until a week or two before release. Offer a promotion. This promotion should be something that encourages people to come and do something in-game for a limited reward on persistent release. Make the game entirely free for the promotion period.
This could be something like a special cape or title or it could even be something like a limited number of points you can spend on a very limited amount of initial gold and resources when the game goes live. It should be something that offers a reward engaging enough to excite people without greatly disrupting game balance.
Take the numbers you see, look at things like how many people were paid customers, how many were free, how many decided to pick up new packages during this period, survey people on things like how bad latency hurt their gameplay and how over-undercrowded people felt the world will be.
Use data from other MMOs to make some realistic protections about where the population will be a year or two after launch and then decide how many servers we need.
I believe though, all good decisions should be based upon data. So here is how I would suggest you split the servers if you do it:
Wait until a week or two before release. Offer a promotion. This promotion should be something that encourages people to come and do something in-game for a limited reward on persistent release. Make the game entirely free for the promotion period.
This could be something like a special cape or title or it could even be something like a limited number of points you can spend on a very limited amount of initial gold and resources when the game goes live. It should be something that offers a reward engaging enough to excite people without greatly disrupting game balance.
Take the numbers you see, look at things like how many people were paid customers, how many were free, how many decided to pick up new packages during this period, survey people on things like how bad latency hurt their gameplay and how over-undercrowded people felt the world will be.
Use data from other MMOs to make some realistic protections about where the population will be a year or two after launch and then decide how many servers we need.