Selfishmoo is right. The discrepancy between IQ and literacy can still be there in childrem with lower/low IQ. Not always as glaring obvious but can be picked up.
Dyslexia is hugely middle class in terms of diagnosis. the statistics are HUGELY skewed towards this area of the population. But that is DIAGNOSIS and not prevalnece. there is an imporatant difference.
And resources are filtered through to children with dyslexia diagnoses. There are many chilren in private schools, specialising in dyslexia, funded by LEA'a as the parents took the LEA to tribunal to demand this. I know because I've been to these tribunals.
Also been to tribunals where parents want statements for dyslexia and LEA refusing. Once identified parents understandably want help and resources and many, again understandably, go to great lengts to use the system to get that. Despite the school and LEA knowing that there are other children in that school/LEA with greater need.
Of course parents fight for their childs needs, whereas LEA tryiong to identify the most needy to direct resources too. AS many on here know that leads to many clashes, and dysleia often an area that they clash over.