With my stuff from USPS and then NZ Post the tracking showed when it left the US, then there was a 10 day silence before 'arrived in New Zealand' which was when it was sat in customs. Then it had regular 'clearance delay' whilst it waited for MAF, before finally clearing on Frday AM and being delivered on Tuesday.
The only glitch in the tracking was that the MAF clearance reported on NZ POst tracking was reported as 'Attempted Delivery' by US Post, but the final 'arrived' was accurate (I wasn't in, so the email that I got to say it had been signed for was the first I knew it was at home).