FACT. Scientific evidence supports that hair may grow at different rates on various places in the head. The movement and growth of hair follicle are usually independent from one another. But the difference in growth rate is marginal and sometimes negligible that it does not affect the overall appearance of the hair.
Sources:
•https://www.hairboutique.com/tips/articles.php?f=tip1135.htm
•https://www.hairfinder.com/hair4/hair-growth-rate.htm