In my case I've seen them around but not that much, I work in a high profile company and a bunch of coworkers have them but still... just five of them or so (300+ employees), and in the streets it's the same, If you see one or two in day that's an exception. But you do see lots of android phones... and LOTS of samsung smartphones... like the Galaxy S2 for example...
And yes, Internet rates for smartphones here in argentina ar outrageous... and the speed totally sucks... but such is not the case with Uruguay (the neighbor next door

) In Uruguay you can get an internet connection in your smartphone for no more than 5$ per month with 3GB of cap and in some cases more... you just gotta find out that you can tier the internet connection of your smartphone with the ADSL you have at home, with the same company that means 5$ per month of 3G data

. Yet again... you pay 1000$+ for any iPhone black market or not.