I would appreciate it if the title included some indication that this article is a Mac specific article. Though it may be hard to belive, I was unfamiliar with the publication.
Hard drives fairly commonly get 130MB/s or more nowadays and a NAS should definitely max out at more like 110MB/s read or write on sequential access.
Was hoping to see different RAID configurations as well. Copying some files last night I noticed my 6 spinning disk RAID 5 array maxed out at 525 MB/s.