I really really hope those EWs would lengthen out but I have to be honest and tell you that with Stan they never did. He never slept past 5.30am until he was 2 and we got a Groclock. With Audrey (as I think I've already said) I kept a 5am feed until she was about 18 months old, just because I hated the EWs so much and with a 5am feed she would go back to sleep until 7. (I know you've said your boys don't, so different situation.)