I would make the argument (as a 20-something) that there are far more 20-somethings on Tumblr than there will ever be on Posterous. Posterous has always felt,

I would make the argument (as a 20-something) that there are far more 20-somethings on Tumblr than there will ever be on Posterous. Posterous has always felt, in its design, to be minimal and content based. It is not about posting cool photos you found online, funny youtube clips and a quote out of the book you're reading. That's what 20-somethings are doing with tumblr.