I have noticed that too.
The last thread you made may have had more interest in the Micro-controller section, at least for the Leonardo it has worked out to be 8 pages so far.
I wonder if there are enough people that actually need a better processor. On this forum it seems the most common board is 328 powered. The Mega is available but, it costs more and is overkill for a lot of projects. Then, I read about people wanting something smaller yet so they are looking at the Tiny stuff.
For myself, the Due would be interesting for higher speed logging and graphics. However, I could probably do everything that I need to do with the 328 or the Mega. The other issue I see is that it will be difficult to solder an Arm chip to a PCB on a new design. It would take some serious work to make my own board for it using Eagle also.
I do think that once some interesting projects are started using the Due, other people will gain interest and join in.