It's in the features section of the Canon website:
Canon Link
I'm pretty certain the cross-type is new to the Autofocus, I don't recall hearing about this newer technology until the 40D came out, and the original 5D was a few years before. Sadly, the 50D has cross-type on all whereas the 5D only has it on the center, which I find quite odd, and is the only disappointment I can see on the 5DII AF.
The main people complaining about the auto-focus are disappointed action shooters. A niche*. Nikon pleased them and Canon didn't. Canon has been the sport photo king for years now with it's 1.3 crop 1D Mark II/IIn/III series, (which rings in at 'only' 10MP), they didn't feel a need to make the 5DII the new sport hero - they already reign in that market with a different body. The only Nikon's you'll see on the sidelines are the disgruntled Canon shooters that want FF. (okay, that's just a baseless comment, no merit) Congrats to Nikon for grabbing that niche, but it's exactly that - a niche.
Just because they didn't double the point areas doesn't mean they did nothing with it.
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* I'm by no means saying sport photography is a niche, it's definitely a HUGE market, by niche I was referring to sport photographers that want FF. I would think the % that wants FF is small compared to those happy and making money with the 1.3 crop and the fantastic L glass.