This response is of the 'take it or leave it' variety; e.g., worth approximately 2cents.
That said, several secondary applications invite applicants to discuss adversities they have faced in the path to their objective. This question can potentially identify unique situations, challenges, or aspects of character in an applicant's life. Some applicants have faced legitimate adversities and overcome them. The resulting answers to these questions can sometimes be remarkable. For example, a blind student graduated MD last year and is now (I believe) in anesthesiology GME.
As I read your situation, the LD you describe sounds like a legitimate obstacle that you faced and overcame. Perhaps you see it as an adversity that you faced in your objective? If so, then it would seem to be an appropriate and genuine answer to the above question. The other side of this coin, however, is that the LD could be taken as evidence of your scholastic abilities. My response to that observation would be to consider the associated GPA and MCAT. Both of those measure scholastic ability. If both of those are competitive, then the disclosure of the LD in an adversity statement could be taken as an example of dilligence and integrity.
Again, this is food for thought.
