These are the higher ISO images from Firmware 1.10 (only low and normal NR images included).
Low noise reduction images:
Normal noise reduction images:
Looking at the images, it does seem that the Sony jpeg engine has improved significantly in this latest firmware, with at least one stop improvement in image quality compared to the FW 1.02. Previously I would not have thought of using above ISO 6400, but it does look like ISO 12800 is now useable and perhaps even ISO 16000.
Thanks to Sony for this free upgrade.