As each day passes, the pesos devaluation is in full effect. Officially through the Official rates, the currency has devalued roughly 15% in 2012 and 5% thus far in 2013 vs the USD.

I trying to figure out if paying USD at restaurants, shops, etc will get you that much further of late, will it?

I hope 2013 is not like 2000-2001 for BA, just starting to get more into this as my trip there is upcoming in 2 weeks.