Am I able to do shallow DoF with RX100?

The Nikon 1 isn't any better in low light though where pure PDAF really shines. The 1 series is not pure contrast detection but uses a hybrid CAF/PDAF system so you shouldn't use it as an example how far CDAF has advanced. Some 4/3 cameras use a fast pure CDAF system but it works best with stationary subjects. It still can't track moving objects like PDAF can. I find my RX100 is the same way. Fast on stationary objects but it doesn't track as well as my DSLRs.

--
Tom
Look at the picture, not the pixels
http://www.flickr.com/photos/63683676@N07/
http://www.flickr.com/photos/25301400@N00/