submit extral materials on 10/24 and received notice on 10/30. Support materials (8 papers which cite my papers) on 11/7. The case has been approved TOday, 11/09.
They work fast.
I did not include the citation materials in my original application, as I did not think they were so important. It turns out that they are required.
The case was prepared and submitted by myself.
DIY case.
I hired a attorny and paid money. I was provided several sample letters, they are not very useful as they are just 1-2 pages. I wrote all letters and my research summary. Although I needed to get my case in before 9/30. So I submitted by myself using all materials prepared by me. I think the quality of a case depend on yourself, your preparation.
Good luck guys.