usually but not all the time. i got 10 seedlings all are the same height but 2 lol. i hope all the tall ones arent males ill be sad.ya still young but pretty male looking to me. you can watch it for a few more days to be sure without issues. i believe i have one right now in the same exact age and stage as you that i need to check at lights on. by the way. the males usually end up being taller than the females so dont be upset you gotta give your tallest plant the chop.
simply put way too early...