I guess it probably depends on how complex your case is. For me I had been deferred for sleep apnea, adhd (adderall rx) and anxiety. After I took care of all the business they wanted me to and submitted to all the testing my file sat at transmitted for 7.5 weeks. I looked one day and it still said transmitted and when i looked the very next day it had skipped completely over in review and Final Review was highlighted and i had my 3rd class medical SI on the screen about an hour after that but like I said it depends on how complex your case is I'd think and you're going for 1st class so I don't know how much that will influence it either. Also for reference my medical was issued August 24th.