Icyedge on 16 August 2010
Actually it seems that in 2009 the attach rate was higher on the PS3. Tough it may be related to better exclusives, not necessarily more console.
"The PlayStation 3 enjoyed 115.6 million software sales in the Sony’s 2009-fiscal year (runs from May 1st 2009 to April 30th 2010), up from 2008’s 103.7 million units. Surprisingly, despite a lower hardware installed base, this performance was better than that of the Xbox 360, which achieved 103.1 million software sales. The PS3’s boost is sure to have been caused by a number of key exclusive releases, such as God of War III."
http://www.playstationuniversity.com/ps3-software-sales-outstrip-xbox-360s-ps3-attach-rate-up-to-8-1-3807/
