Give this article a read, it's very amusing! Apparently, this well-paid expert has no idea how to do what he's getting paid to do. How can someone who obviously considers himself a professional be so clueless?! And i quote:
And for the clueless ones among us - 99% of the CDs he is referring to were burned from MP3s that were transfered to WAV format.Generally, this high-tech "Top 40" holds few surprises. But last week, Eminem's "The Eminem Show," which was yet to be released, cracked the chart at No. 2. Although pirated versions of the album were widely acknowledged to be online in MP3 format, Gracenote's figures look only at physical CDs, not downloads played on a computer.
"It's pretty safe to say that it's all CD-Rs that people have bought off the streets or burned from friends," said Gracenote CEO David Hyman. "This is the first time anything unreleased has shown up at No. 2."