You would be amazed at how many "companies" don't run SSDs in RAID10 or even RAID 1. Same goes for mechanical drives. No wacky marketing here. We used to have the fastest production SSD hosting setups in the world. Then the cloud folk came in with their massive SSD SAN setups and bechmark higher than we do, as we don't use SAN. But we were indeed the fastest in the world.
On the contrary, there isn't anything you can do to actually optimize a server for XF. There just isn't. You can optimize a server in general, you can add litespeed, memcache, APC, etc. all you want, but nothing in doing that is remotely specific to XF. You can do that with any server, and say it's optimized for any application you want. Simply a marketing gimmick here, I'm afraid.