Few other interesting things to note of the alexa graph is:
- Facebook crossed youtube traffic just about an year ago.
- Google crossed yahoo traffic only late 2008, that too mostly for yahoo traffic went down hill.
- What caused the sudden rise in internet usage in oct 2009 (for all top sites sites except yahoo show a spike in traffic). Can't be early christmas traffic, guess facebook triggered this high adaption of users who spilled onto other sites too.