I was always under the impression that when a child gets their molars, they will be fussy and…

I was always under the impression that when a child gets their molars, they will be fussy and irritable. Samira got hers about 3 weeks ago and we didn't even realize they came through until we looked harder and dug in her mouth. She didn't scream, be not like herself, etc, the whole time. 17 months and she's got her top molars, top 6 front teeth, bottom 4 front teeth, and the bulbs for her bottom molars. When your LO teethed in their molars, how were they? About when did they break theirs through the skin?