It was kinda gradual for me me, but, at about a month I was walking the dog with no lights, moonlight, or car lights on a back road. I smelled a cigarette, and lo and behold, a lady walk past me about a full minute later. She was coming towards me. I knew I could smell at that point.
That came before taste. At about 6 months, juices were just so much more distinct. Previously, I was limited to single flavor juices and so I started trying more complex flavors. Nicoticket, to me, has complex flavors. Just multiple flavor ingredients. I like them a lot now.
Hope helps