Martin Pool, whose blog lacks a comment facility, quotes a history of Windows NT:
The first two weeks of development were fairly uneventful, with the NT team using Microsoft Word to create the original design documentation… Finally, it was time to start writing some code.
(I wish I’d seen this line a couple of days ago and could have quoted it in my bzr talk; I spent at least six full weeks writing and reviwing design documentation for that. 🙂
Martin, clearly your productivity would have been higher if you’d used Word to create your design documentation!