I wanted to think so, but it turns out he's "really" not disabled and uses the wheelchair as a disguise, so I have mixed feelings about it. Ditto with Grover and his crutches -- I was all excited about that until I realized they, too, were just a disguise for his perfectly formed goat feet.

Something similar happens with Percy and his dyslexia/ADHD -- if those things aren't really disabilities but actually advantages in the life he's meant to live, I can see how some readers with the same challenges might be excited by the positive twist on it ("Maybe I'm secretly a hero too!") but others might be frustrated and discouraged because, well, they still have to cope with the difficulties but don't get those same advantages to go with them.