it seem all the fuss with rpcbind and nfs not reloading at boot is solved in Jessie, at least I found that when I remove the FSID=0 from the server exports file definition it seems to work well.
So Update :Nov 2017 on Stretch lite on Rasperry Pi zero
Tried with Autofs to mount the server NFS but go constant dropped folders and NFS server timed out – tried all options on mount, timeo, sync etc to no avail. The only thing that worked was a new SD card with Stretch full but mounting the NFS in fstab, although it appears stable (no more time outs) the systemctl status nfs shows .mount changed on disk run daemon relaod. This looks like a bug.