I was IDed as gifted at age 6 through testing. I've asked my parents about the score but they have no clue anymore (and knowing them probably promptly forgot it after they heard the number). I was always the youngest in my class and tended to get picked on even within the gifted program by two girls who were red-shirted gifted (basically, they would tell me I wasn't smart enough to be in the program and that I had the lowest score to get in). I really can't say if that's true but later testing doesn't support that. For instance, I took the ACT in middle school and it would've been above the Davidson cut-off. My parents also have a few stories about me doing a shape shorter at 9 months, and I know I went into preschool (age 2-4) and announced I could read but my parents don't remember how old I was.
Because of that early experience with the girls and due to my parents always insisting that I was a hard worker, I was really convinced that what I did was not unusual but that I worked harder than anyone else. My mom talked about skipping me every now and then but never followed through. They tried getting an algebra tutor for me in elementary school but the tutor rarely showed up. It seemed like my younger years were filled with good intentions that were never followed through on. Once I got into high school and I could pick my own classes things changed dramatically. I took a lot of AP classes, independent studies, sports etc. My day was packed but even with that I was still bored. You think it would've clued me in that maybe those girls were just teasing me when I was younger but it still bothered me even then. College was very similar. I made my own path, convinced professors to let me skip classes/prerequisites, I studied abroad... a lot, I also made some more independent study classes when the college different offer what I wanted.
For me grad schools was much more of a challenge mostly because I no longer had the motivation of grades/praise. Instead I needed to work for the sake of working and I still struggle with that. Sometimes I wonder if I picked the right career path. I like it but I picked it because the subject was the most challenging to me, not necessarily the most enjoyable.
Now after having DD I've reevaluated a lot what I've been through in life. I realize a lot of my frustrations/shyness/difficulty finding friends in elementary school was simply due to the lack of peers. It wasn't that I magically improved the second I got to high school but that's when ability grouping really took over and I had friends that shared my same interests that didn't think I was a freak of nature. I realize that not everything I got from life was due to hard work but somethings DID come naturally for me and were easy because of that. It's a strange realization because it makes you feel less proud about your accomplishments, in a way.
I've also come to the conclusion that I really don't want to send DD to a traditional school. I want her to be able to follow her own interests and not have to do something challenge just for the sack of challenge. I also don't like the idea of a grade based system that distracts from the actual learning.
DH is also gifted although he was never formally IDed but there's just no way this man isn't gifted. He's much more focued than me, though. I'm more well-rounded but don't have one thing that I excell at (I'm definitely better at math/science but still have strengths in writing, languages etc just NOT spelling!). However, he's 100% focused on about 2-3 areas of interest and could careless about anything else. Sometimes he'll be interested in something new for a bit and dabble in it but it just can't sustain his interest. He had absolutely no accommodations whatsoever and basically almost failed out of HS because he never showed up. However, after getting to college/grad school he really found his niche and his life changed dramatically.
Ok, sorry for the novel.

ETA: I really can't comment at this point if DD's at a higher level of giftedness compared to DH and myself. Somethings she's done ahead of us some behind. However, my parents rarely paid attention to milestones and both DH and I were raised very differently than DD was so I'm not sure how much that affects things (for instance, we did baby signing with her and while DH and I weren't particularly super early talkers DD talked sooner than both of us and was much more verbal in general than the two of us and she's bilingual and we were not growing up).