After doing some more research on this Utley book, Google had a page that contained a passage that says exactly how it is with those who were in oral schools and were forbidden to even learn or use sign, and then learned sign later;
Effective education for learners with exceptionalities By Festus E. Obiakor, Cheryl Anita Rose Utley, and Anthony F. Rotatori. ISBN 076230975X, 9780762309757.
This will put you on page 240. Read the last paragraph up to where it mentions cued speech.
At least some of those who read that will see themselves in it. Powerful stuff right there!
This doesn't mean the oralists were completely wrong in their methods. It means that total communications, meaning speech/lipreading AND signing, should have been included and used.