I completely agree. Back in the beginning of November I noticed that especially the ship lag is the worst it has ever been in my playing life. I also have noticed spawning of ships has either lagged or decreased since then. I wish they would fix this very soon because I am so annoyed of it. Back in 2007 there were no lag like this lag.
EDIT:About the WiFi... If you have measured with speedtest.net and have above 1mbps you're fine. Disney believes that WiFi will decrease performance. It does, but not very drastically... I have a 35mbps (connected speed) speed and it only goes down to about 22 (WiFi speed) at lowest times.