don't recall the exact time of the change in reporting hours but I distinctly remember that in the past when studying with a baptized individual only the study conductor was able to count the time. Now however, as mentioned in the April 2011 KM Question Box, both the study conductor and the publisher who accompanies him or her on the study should report the time spent.
This has been the case for quite some time and was explained as such in "Organized to do Jehovah's will" published 2005, page 86 par 2.
This week there is a Service Meeting item entitled "How much time should I count?" It refers to Sept 2008 KM which announced that henceforth both parents at the family BS can count time up to one hour per week!
I got the distict feeling from the item they are trying to get publishers to note down every minute when you say something that could be considered as preaching!
George