Every day I take time out to research online market trends. Although some folks don't find this to be that important as it's not part of their personal business, or model. I try decipher which stats are true, and which aren't. You know the mentality just because it's on the internet IT MUST BE TRUE. Yeah ok.... I'm not that big on "believing the HYPE" from unknown sources.
I present you the
2009 online Nielsen Report!
It's a pretty long document, and if anyone can embed this it would be great.
Needles to say although it doesn't show any adult stats per say you can read between the lines on page 4. on user demographics, and so forth.
I really hope this helps with your online research, and most importantly take a look at the localization stats. Still think it's not wise to localize? Happy reading!