Basically, what she found was that Braille is used more in school, but for leisure reading, kids prefer audio. Interestingly, parents have a different view what the kids prefer than their teachers do. Part of this may be the speed. Audio can be sped up. It's quick and efficient and gets the homework done faster. For leisure reading, audio is more portable, thus, more appealing. But in the classroom, kids use braille because it doesn't isolate them from the other students.
The thing I found most helpful was seeing how she presented the information and what questions were asked. When I do my senior project, I'll need to know these things.