Define 'pocket' - large coat pocket, jeans pocket, cargo pants?
Go to a store - the G1X is only 'pocketable' by very, very broad definitions that exclude most pant pockets, as is the G12 to a slightly lesser degree. The freshly announced Sony RX100 looks like a very interesting proposition in terms of relatively large sensor (Nikon 1 sized, i.e. still significantly smaller than any of the mirrorless cams, still larger than premium compacts such as the Panny LX5 or Oly ZX-1 but in a smaller body than any of them), although I'm a little hesitant due to 20mp crammed on a tiny amount of real estate.
I've used the S95 briefly, and very much enjoyed the handling. I've also been pleasantly surprised by the quality of the Ixus HS220 (now replaced by the 230, I believe), which is a true pocketable cam. Actually OK at higher ISO, not a whole lot of manual control. I don't really like the G series cameras all that much - brick-y, lots of control, but don't quite gel with me in terms of interface.
Seriously consider micro 43 - I recently bought my first two (a panasonic GF2 and an Olympus E-M5). Both fit in a coat pocket or large cargo pant pocket when paired with a 14mm prime (28mm for equiv), but you are buying into a system, so you'll likely get a few extra lenses and so on, and so forth. They are very capable cameras. Sony's NEX series are also very nice, but lack the glass selection and most lenses are so large that they negate any 'pocketability'. And then there's always the Fuji X10, which is fairly compact.