Maybe it's just a local thing, but pretty much ALL of the local phone shops have been pushing the Galaxy S3 as "running the latest version of Android" - which I'm assuming they wouldn't do if Joe Punter comes in and goes "what the eff's this 'Android' fing you keep talkin' about?".
CPW especially were running "promotions" that pushed (hard) that Play carries "a majority of free apps".
Likewise, it's something that magazines like "Android User" (which is widely available - e.g. my local [backwater] Sainsbury's carries it) cover. And I'm sure it's been widely reported elsewhere - BBC Click for example.
Then again, I'm going to point out the very obvious - if you're talking about folks pirating DT then it's likely that they're going to have a higher level of knowledge - e.g. to be able to disable the "no 3rd party installs" protection and then find a suitable dodgy website with the apk on it, and subsequently install it. In which case, they will undoubted have heard of the background to Android.
Heck, even primary school kids know the difference between a phone that's got the iTunes app store v's one with Google Play on it. Okay, mainly down to the IAS user having to pay for Angry Birds whereas the Play user gets it for nowt, but the distinction is still there.