Honestly, like they have been saying during this whole EGA, they are monitoring servers and populations. So what that means, most likely, over the course of the EGA they will notice trends on over populated servers and such an allocate more resources to those servers.
So essentially, they are just rearranging their server resources from lower populated servers to the higher ones that way, come the offical launch their infrastructure will be inline for the flux of people who will want to play on more populated servers, like most "hardcore" players, and have the necessary resources available to sustain another wave of players entering those higher populated servers.