Has anyone here carried out a load test using remote load generators to simulate users from a remote site?
I have tried this in the past and the delay due to latency in the network caused the scripts to fail to initialise and run.
Yes, that is typically a problem.
If you have a good idea what the latencies are you could for instance create a simulation of this either in your scripts or by using a tool like Shunra, which lets you simulate all sorts of connections, WANs etc.
Also take a look at NISSTnet, a very powerful (albeit not for the faint of heart) tool that will allow you to shape your traffic, introduces latencies, errors etc.
Sure, I bet that different tools react differently. What we are currently doing is having a master controller station installed and we remote in and basically run the whole test locally that seems to work very well for us.