I have been gradually increasing the autolyse period, and I have lately been let it do its thing for a full hour before the knead. As I am hand kneading, I find it easy to work with higher hydration doughs, as the initial flour is very well highdrated, and everything stays dry as you knead the additional flour in.
I would say the difference is noticeable for same day doughs, where I ferment for at minimum 4 or 5 hours. I am not sure how much of a difference it makes for longer cold fermented doughs. It seems to work for me, and I like the feel of the kneading better this way.
I have stopped adding oil to my crusts, as I haven't found it as easy to knead in with the dry ingredients. My understanding is that it shouldn't be added before the autolyse, so it is easier just to leave it out...