After reading this question, I started wondering about students applying for graduate school and the letters of recommendation accompanying their applications.
Let's say Student is studying at University A and one of his lecturers is primarily working at University B (lecturer was doing some adjunct or other kind of part-time work at University A). University B is a much higher ranked school. After graduation Student asks the lecturer for a letter of recommendation so Student can attend University B. How much extra weight is the letter of recommendation given in the application process if it is from a lecturer at the university?
I would guess that it would depend on how that lecturer's past recommendations have turned out but I'd like to hear from the experts.
Does it change anything if Student wants to become a PhD and would like to have the lecturer as Student's adviser?