Mostly just has to do with that we're a small company so we stick to certain policies on taking cards (keeps our fraudulent chargebacks down at zero), and we have three part-time employees so we don't ship orders out until the following day after they are received. So if we offered overnight or even 2-day people expect the item to ship immediately, so we just have 3-day and ground so we don't get people's expectations up too high. (Of course I did a comparison around here somewhere comparing Viking360 shipping times to other modshops, we are by far the fastest-shipping modded controller shop on the internet). Nobody else on the planet ships all orders out within 24 hours.