Thanks Lance, I'll put myself on the naughty step!
I've actually spoken to Sony about this directly (here in the UK) and they have assured me that, for example a cx-115E, if bought from old stock, may have EIS. However, any of the newer batches, without any changes to the original model number (still cx-115e) will now have OIS.
They then went on to tell me that they cannot differentiate between them when purchasing online, as the sales person on the telephone or internet only redirects the order to a warehouse person who will pick the first cx-115e up off the shelf, regardless of EIS or OIS (EIS/OIS must not be stated on the box I assume?).
I tried using the website link posted earlier but it only appears to give the spec for the newer made versions of each model (You'd expect at least CX-115e Mk1 / Mk2!!!). Either that or they minimise' what info they supply on the website by putting, copied strainght from the Sony website: "SteadyShot (Image Stabilisation) = SteadyShot Active Mode" which does not state wheter it is Electronic or Optical.
The problem also arose when contacting private sellers - who do not know where to find the specification of the devices they are selling. I have descriptively asked which variation (OIE/EIS) their device is but they appear to have great difficulty in ascertaining the information. Which is why I could be doing wih knowing where exactly it is stated on the device/box/instruction booklet.