I gave up on STTN a long time ago and it was like the day I did that, he slept an 8 hour night. He hasn't done it again, mind you, but he gets up around 2 or 3 and is up for the day usually at 6. Some nights he will get up more than that but I've just decided to deal for now.
I was reading in a magazine that a new sleep book came out that talked about ages when you don't want to do sleep training. I haven't read the book, but the article did say that around 8-10 months might not be a great time to sleep train because of separation anxiety. I figure that's good enough for me to stop CIO for now...