Don't worry about whether you are in 1st 2nd or 3rd batch. People have a misconception that as long as you get into 1st batch will increase their chance of getting an interview. Remember that they will only get reviewed when your application is COMPLETE!!! And I know that people are assuming that people will get a priority even though their application is not complete...
Let's just say that you have a complete application and was sent out on 3rd batch and there is an applicant whose incomplete application is sent out on 1st batch. Then a person with the complete application will get reviewed first.