Does nobody have a child who is just 'average'? Please? 
I'm not completely exempt - I have one daughter who is very academic and has mental health problems (so not SN but certainly AN) and it's too soon to tell what my youngest will be like.
But my middle daughter is just ... normal. No academic brilliance, no special needs, no educational needs. Just average. And it sometimes feels like she's the only one in the mumsnet world!
Maybe there's just less to say/worry about for these kinds of children though.
I'm not complaining about her - she's happy and she 'kicks ass' in the performing arts world. But she's a 'straight B/C student' as far as the classroom goes.