In March we actually had the highest number of forum posts we have ever had in a single month, so it's not getting any quieter, despite the fact that you are feeling that it is.
Perhaps it is just down to you becoming more used to the site?
To be honest, I was actually thinking the same recently, but put it down to the fact that when i joined, The Pie and Piston was one section. Seems I was wrong going by what Mr Will said.