I believe the fleet size of Impulse and NJS are similar ( no. of jets ).
If you listen to the " reliable " sources, NJS were just unlucky that they had 146s coming up for the end of their lease and Impulse did'nt. Also these same sources say that the 717 does not fit into QFs long term plans, it's not a regional jet and it's not a full size airliner ( a la 737 ). People have been bagging the 146, and saying that NJS is finished with QF since time in memoriam, well guess what........they are still there.
Ditzy, the main use for the jungle jet would be west coast, last time I looked, Impulse did'nt have too much infrastructure over there.
It's all speculation until Uncle Geoff makes a decision, but I can tell you that NJS' 10 year relationship with QF is far from on the rocks.