Yes, 'independent' is misleading - how are disks in RAID 5 'independent' when the data is striped across them? And in RAID 0 the disks are obviously wholly dependent on each other. They're only independent in RAID 1 or RAID 10.
I know it's all over the web and text books now, but it's wrong. Gartner has a definition on its website headed RAID (Redundant Array Of Independent Disks), which says under RAID 0 'if one drive fails, the entire disk array subsystem is unavailable'??!?
It's not specific to Microsoft and so doesn't require a Microsoft reference.
Just to be (even more?) pedantic, 'independent' is not spelt 'independant'.