I am wondering if there is any weight put into the whether the person is a lecturer, associate professor, professor, etc? I ask because I know a person who is technically only a lecturer but is also in charge of organizing the honors requirements for biology department. We know each other very well, and I feel she would be able to write a good letter. Alternately, I could ask one of my professors that I've taken a class with and that I don't know as well. So, is there a benefit to getting a letter from a professor who runs a laboratory vs a lecturer, when my goal is a phd in Bio?