In order to compare and contrast, can you give the details of the test environment (OS, machine type, memory, network etc.)?
Don't read too much into the absolute figures - it's the relative ones that are more important.
Dell D810 laptop, 2GB RAM, Windows XP, JDK1.4.2
Everything on same box using TCP loopback (except INVM tests), network results to follow once my test machine has arrived.
A more complete set will follow when I have the time.
Good looking trend lines.
Have you posted the message size(s) anywhere ?