Also can confirm. Just turned 30, was born in 93 and don't remember all that much about the 90s. I remember a decent amount of the late 90s, but that's really part of the 2000s. The early 90s is a totally different thing, and it's the 90s people always describe. Late 90s and 2000s are the matrix vibe.
Also here to confirm, I just turned 18 and I was born in 80 and I just graduated high school and my whole life is ahead of me and I'm looking forward to the future tech of the 2000s.
I would think it was based on your years being a kid, not a teenager. I was born in 89, so when I think of being a kid most of that happened in the 90s although obviously it bled into the 00s too.
I always think of teenager as the formative years that influence the adult. So when I hear such and such a time kid I think its refering to that time even though its sorta just past the kid years. I feel like when your a kid your just sorta a kid and not as plugged into whats going around timeline wise and then like preteen you are sorta getting an idea but mostly just imitating or hero worshiping. Teen seems like when really started deciding what they liked and did not like. so rebellion and obsessions and such. Granted people change a lot from that time to but to me it feels the most about when a time periods. I dunno. Lets say flavor really sets in.