Do All Hairs in a Follicular Unit Miniaturize at the Same Time?

I have a question regarding miniaturization in follicular units. I know hair can grow in a single unit (one hair) and also grow in groupings in 2,3, and sometimes even 4 hairs per follicular unit. My question is during the course of the hairs miniaturizing, do all the hairs miniaturize at the same time or will some stay full and vibrant while the other hair(s) become thinner, shorter, and more translucent?

Example: A unit of 3 hairs have two thin miniaturizing hairs and the third hair full, thick, and vibrant. Is hair miniaturization amongst the hairs in one follicular unit synchronous?

Each hair miniaturizes separately within the follicular unit. I see this all of the time as I examine people with thinning or balding.