Processing time means = Texas processing date... when u go to the Service Center's website of USCIS you will find a date under your category. if it says June 29th )for example), that means they are processing applications with current priority dates received before June 29th. So it is important to know when your application was received by your service center also and not just your priority date. If your receipt date is before June 29th based on the example scenario then count 60days from that date before you can make a follow up. But i suggest to make a follow up even after 30days only as i was told by their rep it is 30days.