Hi Brad,
I'm not 100% sure on this but although drive brand & CF to IDE converter can have an impact on speed, I think the Max Transfer and File system block size can have just as important an impact.
I've set my CF cards Max Transfer to 0x1FE00, and I did set my File system block size to 4096 (but beware SysInfo doesn't like a block size over 2048 I believe - it freezes up if you try and run a drive speed test).
Hope this helps somewhat (I'm no expert on this)
