It makes a lot of sense. Quietly cooling two CPUs, a high-end GPU, 8 DIMMs and multiple drives in such a form factor makes me a little dubious. That and it seems pure hearsay on the part of 9 to 5 mac.
Mods please don't lock this, discussion of Mac Pro related articles in the main news section is really hard to have as 90% of the posts are by people who have little interest or knowledge in the topic.