* ahem *  From the article you linked:<p><i>This performance seemed too good to be true until I monitored CPU utilization during a subsequent run of the same benchmarks on a compressed NTFS volume.  The CPU utilization on the test jumped from an average of 10 to 18 percent on the uncompressed NTFS volume to a whopping 30 to 80 percent on the compressed NTFS volume.</i><p>And most importantly (immediately after the above, separated for extra emphasis):<p><i>In addition, performance significantly decreased when I used NTFS compression on larger volume sizes (4GB or greater) and software-based, fault-tolerant RAID volumes.</i><p>Methinks we're over the 4GB mark now.  The article is too old to be considered accurate any more.