It's has always been noted that "waiving your rights" for the LoR carries an advantage over not doing that with regard to letters of recommendations for residency application.
However, I personally think that not waiving the rights carries significant advantages, these are:
- Faster processing time, as the letter writer does not need to write coversheet and DSF and send the letter by himself/herself.
- You yourself read the LoR and see if there are mistakes in it, such as the AAMC ID number or the spelling of your name.
- In rare instances, the letter writer may actually write bad about you!
Let's see what you think about that?