I had different instructors when I took my test (in 2006).
One of the instructors commented on the fact that I did lifesavers before turning left or right at a junction (which I was under the impression that you were supposed to do). He said I didn't need to do them, but that my doing them wasn't a problem since it didn't affect my ability to ride the bike and carry out the required manoeuvre.
None of the other instructors commented on it.
I'm not sure what the 'official line' is though.