At the moment (5 pm GMT) the site is virtually unusable for me, and I'm based in UK.
Tom did say the new server would help, but if this is the new server, then it is much, much worse than the previous one.
Some serious server profiling needs to be done or setup multiple server config to distribute the load.
It also possible - if I remember correctly - that Tom mentioned some DDOS'ing occurring, which may still be the case.
If your vision so exceeds your ability, then look to something closer.