Quite confident. High-level timescales have been calculated based on estimates from all companies we will be using. End-to-end creation and delivery timescales have been quoted at one month for creating a sample copy, one month to manufacture and two months to ship. This leaves one month as contingency.
Not for EU or USA backers. Games will be send to the EU from within the the EU and games sent to the USA will be send from China from Wingo Games using HS Code 9504904000 (which both Wingo and DHL have confirmed there are no import taxes for you to pay).