Who has the most accurate data? I'm looking at a site right now, Alexa has no data for it for some reaons *Shrug*. Quantcast says its mostly male, while Google says it's mostly female!?
It's a very high trafficked site as well.
Any thoughts?
I trust Alexa.com more - try it
LOL ... i tried Alexa and the domain redirected to something else ...
Let's say i was looking for Facebook.com info, it redirected to like "callcenternow.com" ... first time i've ever seen that
Quantcast is pretty accurate for US based properties
Their mobile list is helpful as well
Alexa is great for spotting more real time trends, but gets "played" a lot (ie people faking their alexa rank)
Google Ad Planner used to be great but they are removing any external sites that dont feature doubleclick/adwords inventory
So I would just check all 3