Or perhaps we have given him a lawyer at the expense of the taxpayer, ala Lynn Stewart. That's an annoying thought, but not impossible.
The little bit from the new article sounds quite similar to al-Suri's final rant of 2005 linked below:
http://www.counterterror.typepad.com/the_counterterrorism_blog/2005/12/a_chilling_fina.html
Also, I haven't read anywhere that it was officially confirmed that he was in a U.S. controlled prison. He could still be in a Pakistani prison.