The Speed Test in AC Utilities says about 0.3 seconds from the main machine and about 0.9 seconds from one of the laptops.This could a better hint to fix the problem.
So ryanjo said he gets 0.3 from clients. That doesn't sound like a huge difference. Has anyone else done the test, can report the times they are getting?
What is the test measuring anyway. As I said ping times are 0.001 seconds, so it's not a ping. It must consist of a bunch of back and forths? And then login itself must consist of still more back and forths?
Actually I read that as .3 from the main machine, and .9 from clients. YMMV
I haven't ever run a SQL monitor to see what it is, but I strongly suspect that it is running one or more DB queries, then reporting the time to run them and then get the results. The effect is to give you a more realistic measurement of end-to-end speed.
because SQL databases cache results they suggest running it several times; that is then minimizing variability due to disk I/O. If your first number is consistently slower (from the main machine in particular), this tells you your disk performance is part of the problem.