First of all, I would say don't worry about it; if you find some of the posts helpful, then you obviously belong here.
My children have benefited from the wisdom and experience of some of the posters so that is why I am here.

An IQ number by itself is overrated, especially for adults and especially when you evaluate an adult in the context of a childhood IQ number. There are so many other variables at play that the demonstated/effective intelligence druing any given time span may be significantly different from that IQ number from childhood.

Even if I don't go back so far and stick with adult measures, I still can't say that number accurately reflects my current level of functioning. Based on some IQ conversion charts that a number of elite societies used years ago to convert certain test scores like the SAT, LSAT and GMAT scores, I was borderline DYS level even as recently as my young adult years. However, I am now in my 40's and I can attest that my brain is in decline and I am not as "intelligent" now even though I am certainly far more knowledgeable. There is also the issue that we tend to develop in the area of our expertise (profession) so that other areas tend to decline at least by comparision. There have been some threads, which I had no inclination to exert the mental energy to appreciate and other threads that would have required some review/brushing up for me to fully comprehend.

My point is that your childhood IQ nubmer doesn't preclude you from a forum like this one where posters come for a variety of reasons beyond the commonality of having gifted children.

Even though DS is DYS and significantly beyond the minimum DYS qualifications number-wise, I don't necessarily interpret that to mean that he must be more intelligent that I am. Some abilities (even cognitive ones) cannot be measured by an IQ test. He is also too young to determine where he will end up in a decade and I truly believe that relative abilities do fluctuate somewhat during childhood as children have cognitive growth spurts at different times. I used to have some weird ability with certain complex math problems that has nothing to do with traditional academics . . . sometimes answers came to me subconsciously if I stopped trying to consciously solve the problem. I don't know whether DS has that kind of ability. We also have different mixtures of strengths/weaknesses that can't be adequate captured by an IQ number.