SD9 can do ISO400
There's no problem with DR for this particular scene as the photo was taken in the
evening just after the dark rainy clouds covered most of the sky except for the distant horizon. The "problem" lies in very poor low light capturing capabilities of the SD9 sensor.
ISO100 shots of this scene don't have much more details in the shadows and obviously don't let me use the SPP chroma noise reduction.
To be honest not much more was there to be seen by the bare eye!