On two of my machines the EX1 clip browser software takes around 15 minutes to offload a full 16Gig card from the Sony EX1.
However, my other machine (laptop) takes around 50 minutes. Any idea why this might be? It is a good spec machine, so have no idea why it is so much slower.
It is a Dell Inspiron 1501 laptop, I have used it to edit using Vegas (for SD projects) in the past, so it is not that slow. One of the other machines which copies faster, is actually a much lower spec machine.
I'm guessing here but you are most likely using USB from either the camera or a card reader and perhaps this machine has a slow USB port. Try coping the BPAV file to a new folder to the hard drive of the laptop or a firewire external then see how Clip Browser works. I don't really know much about PC's these days as I have been using a Mac for the last 5 years. This should give you an idea of the problem, if it is the same after this then it would seem the CPU is what you should look to next. I know there are big CPU differences with PC laptops. If you have the PCI express slot that the SxS card fits into you should find much better speeds using it.