I expect immediate communication from a seller. There's no way I'm waiting 2 weeks just for them to let me know its shipped. By 2 weeks I better have something on my doorstep. It doesn't make any sense to take more than a couple days to ship something. If you're gonna take a week to ship then thats something that should be known up front. I also let sellers know that I'll pay the extra $0.65 for delivery confirmation if needed.
With that being said I give exactly what I expect. When I sell something I let the buyer know that I've received payment and the exact day that their item will be shipped which is typically the following day. After its shipped I send them the tracking # that same day. Since I ship through The UPS Store I've had tracking #s not show up for a couple days causing buyers to think i'm scamming them. In those cases I've actually scanned my UPS receipt with my info, their info, and the tracking # as proof. Its really not that hard.