Hi Cyrano,
When I speak of the A319 not being a favoured A/C, I speak of it from what I'm told by people involved in the leasing business. Apparently lease rates of the A/C have not held up as airlines aren't particularly eager to acquire the type at the moment. I would view the A/C in the same light as the B737-700.....successful on orders initially but fading as time goes on when compared to its sibling.