The stats flucuate daily but so do the auction sites. I would watch this for a week and compare daily stats before figuring out where the buyers/sellers went.
Alot of eBay sellers have flighted from eBay due to the new rate increase. Striking out independently to their own sites or other sites.
http://www.powersellersunite.com/auctionsitewatch.php
Good Luck,
Donna