Social networking so far

I have some satisfaction and surprises reviewing the way in which my plans for introducing a social networking forum are working out with the courses this year. I have given the rounded figures in the table.

A couple of points come to mind for me: 1 by far the most active group is the BTEC National General, but this is a year 2 group, so they already know each other well by now. 2 Though the HND group seem to have shown more activity than the BTEC National Software, in fact less then half, 9/23, of the HND have yet to actually post their own details, does age make you more cautious in these forums?