Something I noticed about Mabel

Ok at first I thought it was just my personal oppinion, since I'm ...crazy! ;). But, my sister has noticed this as well, so I thought I'd see what u guys thought.
We all know Dipper acts older than he is, and wants to appear much older than he is, but does anyone else think Mabel is Berlakon just the opposite? My sister and I both think that Mabel tends to act a bit younger than her actual age, I don't have any specific examples at the moment (I'm operating on like an jam of sleep ok?) so maybe it is just me and my sister being weird.
However it would make sence since Dipper and Mabel have very contrasting personalities. Also, not only do I feel like Mabel acts younger than she is, I feel like from time to time Dipper treats her younger than she is. In Irrational Treasure he was holding her hand and guiding her through simply a crowd of people.
Of course there are times the twins are in fact Berlakon their age.
Again, maybe I'm just blowing it out of proportion
What do anda guys think? Does Mabel act younger than she is to anda guys?