Here is an interesting study from Stanford that gives support to what dyslexics have said for years - it's harder for them to read. The study (Oct 2006 J Neurosciecne) isn't yet fully online, but the abstract and figure (below) can be seen.
The fundamental difference in this study is that here dyslexic and non-dyslexic subjects were matched for reading performance - so differences in brain activation weren't due to efficiency of reading issues. 
It's not surprising why so many bright dyslexics will fall between the cracks in the school system - even if they master the code of reading for comprehension, they fail to be identified as having a disability and are penalized for not finishing tests or papers, or required reading on time.
A study such as this also underscores the problems of defining dyslexia on the basis of reading performance.
The Neural Basis of Dyslexia
fMRI Supplemental Info
Stealth Dyslexia
Eides: The Surprising Things We Can Learn from Gifted Dyslexics pdf
Technorati Tags: dyslexia, brain, fMRI, science, teaching, learning disabilities,education, testing, reading, gifted.
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Btw, I wonder why there is so many papers on dislexia and few, if any, on other dys- family (Dysphasia or aphasia, Dyscalculia, Dyspraxia).
Is that a statistic effect based on real data (wikipedia states it's 10-20% but cannot gives a link to data). So is there is dyslexia than any other "dys-" ?
Perhaps a "media", "lens" effect that made dyslexia a common excuse for many education schemes ?
As an example just check, wikipedia on
dyslexia against any other one of the family :
Dyscalculia
Dyspraxia
Dysphasia
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