I'm not sure if that's what people mean about their hair growing upward (I'm not familiar with that phrase, sorry). But I can tell you that my hair grows at different rates depending on the section as well. For me, the back grows much much faster than the front, sides, and crown. I don't think there's anything inherently good or bad about it, but I've definitely found it frustrating at times. Even if I cut my hair, when it starts growing in the back inevitably starts getting longer than the rest in no time. I've heard many people say that some sections of their hair grows faster than others, so I suspect it's relatively common.