There has been some discussion amongst the E852 tutors about the nature of the tutor group forums and, in particular, how formal and academic the language should be. It is a complex question and it perhaps relates to the relative importance of different aims for the forums.
One of the aims is for the students to interact and this would seem to suggest that the language should be relatively informal. Encouragement of interaction would perhaps tend to focus on frequent and relatively unreflective posting.
Another aim would be for students to explore ideas on the course. This might suggest a more academic style as students refer to experience as well as what they have been reading.
Another important aim might be for the students to rehearse the kinds of ideas and the language needed for their later work. This might tend to suggest that students should post in a relatively academic way.
I would think that it might be appropriate for the students to use a variety of different voices as they post but would be interested in what others think.