Did you get a different performance only using Ajax? Did you try IE Plugin?Did you try different browsers?
I know there is a server issue with hyperthreading. For more information, go to this thread:
Have tried different browsers, and the IE plugin. Plugin is slightly better, but not by much - we really need to use the Ajax zero footprint / IE browser in our organsiation due to the desktop policy that we have.
Will take a look into the hyperthreading, thank you.
One thing I failed to mention as well is that the server we are currently using is in the states, bulk of the users (and myself) are UK based - we're all on the same WAN, but coiuld the delays be down to latency on the network? I'm gathering response times from the states to see how they differ.