Agreed. I wouldn't go so far as to call it meaningless without something to compare it to, but I'd imagine conventional disks would still be very fast in that setup.
Yeah - and perhaps for certain scenarios it might be faster? (Pure conjecture on my part).
So - if seek time wasn't a big factor, a fast conventional drive could be faster? And if you have a very high level of striping (ie. 24 drives), seek time might be significantly mitigated.
Given the tested max throughput of the Hitachi 1TB SATAs (http://www.storagereview.com/Testbed4Compare.sr) you should be able to get ~2GBps with 2/3 the drives (16 instead of 24) and near triple the storage space (16TB instead of 6TB). They're cheaper, too, of course. That's just theory, though. It would probably be difficult to get all drives "bursting" at the same time but anyway, this kind of looks like a "jumping into jeans" viral published by Samsung.