Tanuki7 is correct, the worlds are released as a response to customer demand and business need. Also, Jono, a brand new player joining the rim of worlds older than a few weeks old would be at a reasonable disadvantage. You are free to deny it, but it doesn't change the fact our statistics show this is true, as does customer feedback. If a brand new players entire experience of Grepolis was being rimmed by the person they spawned next to 3 weeks after joining, the new player base would struggle to expand.
I would also like to point out, again, that fast worlds have lower maximum player counts. If players request I release worlds like Calydon or Helorus, they need also to accept I need to compensate for their low player count with servers which can accommodate more players. Being frank, if people would like world releases to slow down, they need to not expect speed 3 servers, and they need to expect less frequent speed 2 servers.
Also, to clarify. If this thread is merely going to turn in to you verbally attacking my team for stating facts, I will no choice but to close the thread.