Have you come across any explanations why grammatical gender vanished in English but is still there in German? If this break-down happened in the later Old English period then it can't have been due to the Norman Conquest and the loss of English as a written language, can it?
Heehee, if you want a good laugh, read Mark Twain's "The Aweful German Language" It's soooo true!
would that be the book by George Lakoff? Can you recommend it?