mmm... no now i'd have to disagree.
I saw a tute on creating a similar effect, from the guy that runs the "Pank Pages", "Xtreme Pixels", and "TeamPhotoshop" site... but that was ions ago and i can't find it anymore. Besides, his effect was simple - i.e. didn't have all those twists in it.
I'm not saying a reasonable 'facsimilie' couldn't be created with PS (with a fair bit'o work). I'm just saying in this case those particular 'tubes'/'cables' were most likely done in 3D given the design of the rest of the background.
I'd be interested in seeing anyone's stab at this effect.
Aside from that though the rest of that background was indeed created in 3D, then embellished in PS.