It's a good article but does gloss over some of the negatives that international businesses face here.
The company that I work for has identified Buenos Aires as one of our global hubs for outsourcing and we recently started a subsidiary company here. The reasons are similar to what the article talks about - availability of workers, highly-educated workforce, bi-lingual, time zones (aka near-shore vs off-shore).
However, the article doesn't discuss the challenges of operating a business here.
The paperwork is a nightmare. Incorporations, filings, all of the paperwork that needs to be filed, amended, changed, etc. It takes A LOT of time and time is money.
The cost savings in headcount isn't as substantial as you might think. Salaries may be low but taxes are HIGH (assuming you do everything en blanco which we do).
Laws are very employee-friendly (aka - if someone wants to quit, as an employer, you're going to pay and pay and pay).
The work calendar is not exactly similar to the US (try getting your employees here in to work at 8 a.m., there are 2 weeks of vacation plus 10+ study days, plus however many holidays - think it's around 15 a year)
The gov't isn't exactly stable.
You have to be willing to risk having funds in the Argentine banking system
I don't disagree that Argentina has a lot of benefits but it's not something I would necessarily say is a slam dunk when it comes to outsourcing.