Problem with RX100 images stabilization

I've found the same issues shooting w the RX100 after being accustomed to the much more dependable handheld IS on my Canon S95, at 1/30 and even 1/20 or 1/15.

I imagine however that the much bigger sensor on the RX-100 means that camera shake or subject movement is amplified esp on closeups or when repositioning the camera after focus-locking on a particularly point.  I've experienced similar on my DSLR.  The image from the RX100 is nevertheless more forgiving zoomed out to sizes similar to what other cameras w smaller sensors produce.

In the meantime I've learnt to use shutter priority or simply be a little more steady at 1/30.  I wish Sony would allow Auto ISO in M mode though -- it would allow us to set both a decent handheld speed and aperture while tweaking ISO to compensate for light.