The way I read "man ntpd" (on Debian wheezy), we could (should?) replace
ntpdate by
"ntpd -q"; and if we are going to run ntpd then ntpdate is unnecessary anyway.
If we have (or are going to have) ntpd, then we should simply skip
/etc/network/if-up.d/ntpdate;
seeing how that depends on NTPSERVER
See also
https://bugs.launchpad.net/ubuntu/+source/ntp/+bug/288905
where I said:
The way I read "man ntpd" (on Debian wheezy), we could (should?) replace
ntpdate by
"ntpd -q"; and if we are going to run ntpd then ntpdate is unnecessary anyway.
If we have (or are going to have) ntpd, then we