As a general guide we normally see the shipping times below. Add this to the 15 business days and you'll have a fair estimate of when you new gear will arrive.
Standard Post
Metro - up to 2-6 business days
Country - 4-8 business days
Far (you should know if this is you by now) - Up to 14 business days
Express Post
1-3 business days in metro locations and can be 2-4 business days to non-metro locations or during peak periods.
Please note that Express Post does not make your order get produced quicker, it just means it will ship with a quicker service after the 15 business day turn around.