My 14 yr old DD1, is August born - as well as 3 months prem, so should have been November!
Struggled with physical maturity in the early years, last one to get dressed and the like.
It helped that she started her education at 3 in a private pre-prep. They had a great system where the July/August boens started witht he previous academic year for the first term.
Moved on at 7 to a selective school, and struggled badly with handwriting and organisational skills.
Moved to state comp at 11, has been in top sets (for everything setted) ever since, G&T in several subjects (FWIW), although struggles with creative writing. My gut feeling is that this is more down to maturity than a learning disability.
9 year old DD2 autumn born, has always flown at school, especially in literacy. Frighteningly mature for her age, but part of that could be through having an older sister.
DH August born, and always struggled at school. Not helped by early years in a poor inner city area. ALthough he went on to do a degree level qualification in his late twenties.