That's because there is very little, if any speed difference when booting from a CF card.
The primary reason fro booting from a CF card or some other flash memory is to allow the system to boot despite a harsh environment, namely extreme cold that would congeal the fluid surrounding bearings, causing the drive not to spin up until it warms up a bit.
And no, the Ghost image to a CF card isn't going to work, at least not for very long. CF cards have a limited number of write cycles. Since windows is going to write to the boot partition repeatedly during the course of normal use, you're going to exceed the write cycle limitation in short order.
There is a guide to preparing a Windows installation for a CF card so that it doesn't need to write. I don't know what all is involved, because that's nothing I'm doing for my project.