I was 100% effaced at 36w (2 weeks ago!!), the baby is so low her head is threatening to come out of my vagina right now... and I'm still here... just waiting for labor to start. lol
I have no idea if I've dilated since then because my MW does not do internal exams without good reason (like at 36w I was having very painful contractions and I was still considered "pre-term" so she wanted to see what was going on).
Now's the time to rest up and fantasize about baby time! Dilation and effacement do nothing to predict when you will go, unfortunately. Hang tight!
I agree that it's good to know that your body is preparing, though.