Thin Client speed question

Hi,

We've purchased a C90LEW thin client recently.

It has Windows Embedded XP on it,

we are using VM View Client 5 to connect to our VM machine

here is the question

after the VM machine is created, it is a lot faster processing speed if we connect to the VM machine using regular desktop PC, compare to Thin Client

I thought everything is done over the server and the client is just a remote control, therefore it doesn't matter what kind of hardware you use to connect to the VM machine and the speed should be the same

any suggestion?

Thanks