Thanks for the reply! The plant is on day 58 of veg so I hoped the pre-flowers were more developed by now. I'll see how it goes.
It really depends on the strain, I have some Blueberry fems I've been training, their around day 80 in veg and only 2 have started to show a few pistils.
I've made a few clones from each plant though and all of those have started to show pistils.