I can't believe Yahoo! held onto the #2 spot for so long, especially since the sites don't seem to be tracking Yahoo!s network of sites.<p>I wonder what is counted. What Yahoo! network sites? Are Facebook applications included?
In the first graph, Traffic:<p>What happened at approximately Feb-Mar '09 to benefit both sites? Yahoo reversed a decline, and FB accelerated.<p>What happened at approximately June '09? Yahoo's rise reversed to a decline, which still continues as of Jan '10. FB's rise went flat for awhile, then resumed a shallow rise which still continues.