I've already got the info I need from the Clariion Best Practices.
In my case, it is: "You EXPECTED what?!?!
Well, not exactly, but there are many caveats and setup dependancies that makes it seem next to impossibly to get better striped performance using MetaLUNS. Seems more like a sales pitch check-off than a real thing I would use.

As far as spindles, no way. In this particular case of have 5 disk reaid sets. Each of the raid sets provide a single LUN. I then want to stripe across ALL of the in a single MetaLUNs. So I should be striping across 20 disks by the time I'm done.