Nice point. I think that you're right that other conferences would be similar (e.g., NEUDC 2013 had just 2 papers with poverty in the title). But I wouldn't trust title analysis as a sufficient indicator of interest within the profession. Many of the papers are focused on increasing incomes and reducing poverty, whether through education, health, fertilizer use, cash transfers, or other methods. None of the PacDev papers have development in the title, but just about all of them are about development on some level.
That said, this may suggest that relatively few papers are focused on measuring directly the impact of interventions on reducing poverty.