I dont know if it has something to do with our case being approved but since the status in the visa journey said that we already passed the waiting time.. Me and My f (https://egov.uscis.gov/e-request/Intro.do -under case outside processing time) did this... and it suddenly got approved after few days.. I was advised by a friend to do it because thats what happened to their case (a little different because it was RFE) then after few days it got approved. then 1 as well called the USCIS inquired and was told to wait until March but few days it got approved.. IM not so sure if it has something to do with approval but thats what we did and it resulted to good news. I THINK theres no harm on trying it.
PS: I know few too that did the same(earlier filers) but still not approved(wish they all get their approval too).