Mine resists any sort of day sleeps at all... we've been to day stay etc and all they could say was that she was one of the most determined babies they'd met..! She sleeps from 7pm ish (sometimes later - 10pmish) through to somewhere between 8 and 11am and then if she naps at all during the day it's 20mins max.
We don't have a routine, it's all baby led etc and she does her own thing. She has lots of tired signs, and i know the really early ones too, but whenever you catch her she won't sleep. I won't do CIO/CC, I don't believe in it and short of drugging her/knocking her over the head we've tried everything else. We're now basically going with it to see what happens. She does have the occasional day where she sleeps almost all day as well so we're just accepting that's her.