He shows how the New York Times, a more than 150 years old institution, with its nytimes.com performs versus YouTube.com - daily reach January - June 2006.

I'm not sure whether you can draw straight conclusion on this diagramm, but... more
And I'm also not sure, whether I would call TimeSelect a sure prove that putting 'content behind a wall' works as a convincing model for paid content (if only about 1,2 % of my 'hungry' readers decide to make a contribution for this 'special offer').
Update Turnover TimeSelect:
according to GigaOM
"Times Select has generated just $6 million in sales so far, a rounding error for a company expected to post $3.5 billion in annual revenue this year."
Earlier entry:
New York Times Company Report Mai 2006: Online Chips