Do juvenile hairlines start at the highest crease?

I’m 19 and started to notice my hairline change about a year ago and just today was trying to measure to see if it’s in the mature hairline category, I noticed everyone says that juvenile hairlines start from the highest forehead wrinkle, and I was wondering if this is always true because I have a picture of myself from when I was 10 or 11 with my hair slicked back so you can see my forehead very clearly and it really doesn’t look like my hairline starts where my highest forehead wrinkle is, idk maybe my highest forehead wrinkle is very faint and I can’t really see it but I even measured the ratio of my forehead to the rest of my face from that picture and from a picture now and if I measure from the center of my hairline my forehead is in the same proportion to the rest of my head in both pictures.

Yes, all juvenile hairlines start at the highest wrinkle of the furrowed brow, see this article which discusses hairlines in children, women and men as they develop: https://newhair.com/wp-content/uploads/2018/11/phenotype-article-published.pdf