Has anyone else noticed this about labs through the years?

[coco-bean]

I've had labs my whole life...chances of being purebred were pretty good but i know when i was little they werent all pure. anyways i've noticed since the years of my childhood that the purebred labs seemed to have much shorter hair then they do now? or is it just me?
I know they have short hair naturally but it just seems like their hair has slowly gotten little by little longer...