I would be careful about including PDO and IOD and that grouping, as well....I have already established that the PNA is relatively stochastic in nature and parts ways with the PDO fairly frequently. I think it increases the likelihood of such an occurrence when the the negative PDO is ascending, as it should be this season. As for the IOD, I have already explained why its not as coupled with la nina than it would have if the event had developed early in the summer, as opposed to lingering from the past two years. This is at least in part why it is playing out as I have said it would, with la nina stagnating and even eroding somewhat, as opposed to flourishing this fall.
I think a situation like this is where the bias of certain posters is on full display because while assertions may not be without merit on the surface, there is a reluctance to dig any deeper because the simple conclusion happens to suite said bias.