Despite the dreams of higher level accounts being on "higher quality" servers - I do NOT believe this is true.
I'm on an L3, almost always been on an L3 and my server is busy but doesn't seem to have any special L3 only stickers.
I believe that loading is based on the server's estimated capacity to support the load with room to grow. Thus everyone who signs up today will NOT be placed on the last server to be installed but spread out through the systems to try to keep usage reliably level.
Of course I'm a customer and I know 1/10th of what DH does about their systems and policies. I just try not to piss them off and thank them for keeping things running so I don't have to.
Wholly - Use promo code WhollyMindless for full 97$ credit. Let me know if you want something else!