I have had some mixed results with International post. Anything from the USA can turn up either fairly quickly (about normal) or at a snail's pace. I have a magazine subscription which seems to deliver at the normal rate, but two back-issues ordered months ago are not here yet, maybe still in the USA. Another small item is also delayed.
A book from the Channel Islands (I think) took about the expected time to arrive.
Mind you, a couple of items from China arrived surprisingly quickly.
I'm not sure what this says to us...
Colin.