More progress in identification of different types of dyslexia:
From the Hansen group at Oxford (college dyslexics) Excerpt: "The results revealed a striking heterogeneity of profiles. Nine dyslexics exhibited only a phonological deficit; one a phonological and a visual magnocellular deficit; a further three a phonological and a cerebellar deficit; two either a cerebellar or a visual magnocellular deficit."
These findings once again highlight the importance of comprehensive assessments in the diagnosis of dyslexia, and reinforces the "more than reading" aspect of the condition.
What this field really needs are more case histories of dyslexic individuals throughout the life cycle. Scientific research is too narrow in their selection of experimental endpoints; what we do not know is how dyslexia unfolds from early childhood into successful adulthood. Knowing more what the different developmental variations are will help us target educational or other remediations as well as know when to avoid pointless frustrations and learn how to wait and /or apply accommodations.
From an imaging group (below), more support for heterogeneity in dyslexia presentation; this recent volumetric study from Stanford suggests there are many sites of potential differences among dyslexic vs. non-dyslexic groups. It's not just a reading / phonology disorder. Areas that "light up" suggest anatomical differences that affect visual processing, memory, and motor planning.
Cognitive Profiles of Adult Dyslexics pdf
Brain Differences Between Dyslexics and Non-Dyslexics