zzzz He doesn't consider epilepsy a disability because his is controlled by medication, and is life is unimpaired by his condition (cf. colditz's experience)
polter I do think my view is similar to how you defined it- SEN is an additional need that impacts upon a child's learning.
I may point out Starlight and stripy that being top of the year may be a SEN in some schools, but it is not in DD's- she attends a highly selective academic school, and she is pushed, and stretched all the time, it is expected of their pupils.
I have never posted on SEN board (I think, but maybe for DS) but I have been lured to SN boards on occasion, primarily when moose, HJ and Hothead are on there (goldmandra, marne, and ?rockinhippy have also helped enormously), and I have received excellent advice, been warmly welcomed in the main, and empathised with- support I very badly needed at the time. There are some abrasive posters... but there are all over the internet MN, and I'm a big girl, and can stand up for myself mostly. I do realise that MNSN is a safe place, where people who are going through the same kinds of issues (and we are talking issues that are life-changing, and have serious long-term consequences usually) and posters will need at times places to vent, and to howl, rage, rail against the system, and grieve or mourn what might-have-been too. I don't think anything really prepares you for having a child with SNs, the more limited choices for that child, the lack of support for parents in that situation- I am very grateful that MNSN exists, whether it is imperfect or not.