There is a positive correlation between dyslexia and entrepreneurship according to at least one study that has shown dyslexia more two to three times more common among entrepreneurs than the general population. http://www.cass.city.ac.uk/media/stories/story_8_45816_44300...

One common symptom of dyslexia in an adult is difficulty spelling. http://www.interdys.org/ResourcesCommonSignsAdults.htm

In my experience working with dyslexics they are more persevering: some tasks that are easy for many require more diligence and practice. It's a habit they develop in childhood to survive. I think this habit may be one source of their entrepreneurial success.

See also http://money.cnn.com/magazines/fortune/fortune_archive/2002/...