By looking at the images, one sees that they are clean, but at the cost of fine details, which are smudged away as a side effect of creating those silky smooth pictures. The biggest drop in image quality: between ISO 800 and 1600, during which the fine details at 800 become messy blurs at 1600. This is especially evident on the studio shots with the fabric pieces.
Despite a gigantic sensor, simply can't deliver the goods on image quality in JPEG format, which will be a disappointment to many potential users as most P&S shooters just want to have pictures and not play with RAW conversion.