@statuspidit: I think the bar code might expedite the process but it depends on USCIS solely. for few people like mine, they have made the application review by officer call which I don't know why they are doing it In addition i did the bar code application as well in pdf format. I think there must be some other reason for delaying the app process which we are not aware of. One can be receiving lots of application more than what they can handle..