Excuse the long reply. I took awhile pondering your original post before replying. I handled discussing LD diagnoses very differently with my son than my father did with me, and I have mixed feelings about it.
My father, who later had a NVLD diagnoses as a late teen, was very much pegged as a "problem student". This was back in the days of streaming, and he was put in the bottom stream with little assistance. Due to later province wide mandatory IQ testing, he found out he was far from stupid (gifted, actually) and sought further counseling independently. He had very poor trust in the public school system.
When I entered Primary (equivalent to American Kindergarten), my combined behavior and academic strengths and weaknesses were so unusual, the school was pushing for me to be tested and possibly schooled elsewhere. My father insisted that they do the full range of cognitive testing, which I had. All I was told from it was that I was gifted. I pretty much was treated as if difficulties were from laziness, pushed to succeed, and very much taught to believe I could. The reason I have mixed feelings is that what my father planned did work in many ways. I was a highly successful scholarship student, working professionally as a musician before I was even out of high school. Where it started to fall apart somewhat was grade 11 through university. I was really frustrated in math because I knew the work but with the increased work load and speed required, I kept copying questions down incorrectly or lining up numbers wrong, and would have problems over that. I was also having problems with taking notes in lecture format classes (poor, slow handwriting) and generally with just listening to them. I was given my own school records on my request in grade 12 and found the NVLD diagnoses (with visual processing as the primary weakness) then, along with suspected issues in some aspects of receptive language. I was both annoyed at feeling my potential had been underestimated, and relieved that I wasn't just weird and that there was a reason I was great at calculus but couldn't copy numbers correctly. The psychologist I had at the time questioned the validity of the testing due to young age, but I think some of it did apply. I had a very rough first year of university, with wildly divergent grades and some very poor emotional health. I had years of counseling for anxiety, OCD and social discomfort. I think I would have been better off with access to understanding my problem (with or without an official label) and treatment at a younger age. I think personally, I would have not understood a need for an IEP plan, so I can see where your son is coming from, but some sorts of adaptations would have helped.
My own son was diagnosed this year at age 11 with ASD (Asperger's sub-type). He was very much involved with being told of and understanding his diagnoses, and the occupational therapist incorporated a lot of education on his condition into the treatment. I was very worried he'd be underestimated, or think himself less capable. At times I totally got why my father had acted as he did with me. I agonized so much over the whole diagnostic process. In actuality, he was kind of relieved. He also quickly made connections to that he had corresponding strengths to his weaknesses. He's come to the conclusion that he has just as many abilities as disabilities involved in this diagnoses, like great observation and focus. I'm early in this road, but I think so far disclosure was the right thing in his case, especially since he wanted to know.
I think the important thing is remembering that no one fits a diagnoses to a "T", especially ones like NVLD and Asperger's with huge ranges of difficulties and abilities, and people having problems in some but not all areas being a common phenomena. What the diagnoses will mean to your son, and what sorts of accommodations make sense will be an evolving process. And lots of things may catch up at a later time, there is no fixed limit to learning. My Dad couldn't "get" math and never got past grade ten. He completed high school and college in his 40's and is a certified purchaser now, and deals with complicated math and contract language daily. I have a way of assigning numbers with a tone that helps me copy correctly. DS (who, like your son, has friends but talks their ear off, with the added problem of going on about pet topics) really has gained a lot from social skills classes and direct teaching. Diagnoses are tools to help people understand and help themselves or their children. They aren't a final say in how life will proceed or what is best to do.
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