The wax does not necessarily mean the wood is green. Wood dries radially different than it does length wise. The wax keeps the ends from drying out faster and causing checks so that the wood will dry radially. The wax is put on as soon as possible to help control the drying rate from the end and to prevent checking.
If you have a moisture meter or access to one you can use this to determine. All the good kiln dried exotics I have ever seen come treated on the ends. That isn't saying that it isn't green but if they are exotics, considering the distance they have to come, most of them are aged a bit. The wax is just good practice.