Sally Shaywitz confirms this in her research.
The researchers found that in typical readers, IQ and reading not only track together, but also influence each other over time. But in children with dyslexia, IQ and reading are not linked over time and do not influence one another. This explains why a dyslexic can be both bright and not read well.
So do I need to say more?
Dyslexia defined: ‘Uncoupling’ between IQ and reading.