Prabhat, I did the expediated process. I attached the job offer letter with the application. As other people have done, they attached the personal cover letter explaining why they want the expidiated process. However, my international advisor simply put the expediated request in front of the application. The whole process took only 22 days for me to get approved. It might be different with the different service center, I used the nebraska service center. vermont is the busiest so they take a bit longer than others. good luck to your application. and don't worry about it too much, the job offer letter really helps.