It's just the PS3. :P Which surprised me a bit after the repeated ad campaign around the AWESOME power of the cell processor on PS3 - but I guess all that power is thrown into an architecture focused on graphics processing. Frankly, I don't know enough about it to say if future linux distros will be able to perform better, but I do know linux on my 4 year old old laptop easily outperforms my PS3.
Taking a step back, it is still pretty amazing that you can use a gaming machine as a true PC at all...