It still amazes me how people take Cabrera seriously. Everyone knows he is a provocateur...I must admit he is really good at exposing the deep bias and the superiority complex many foreigners from First World countries show in Argentina.
Now, yes, customer service in Argentina sucks. In my opinion it has a cultural origin too. Argentines - mainly porteños- are very direct and a fake smile usually can cause exactly the opposite effect, namely, that one is trying to cheat them or is teasing him (many young people in BA use 'sonrisa de McDonalds" to refer to this fake smile.
Customer service also sucks because there is not much competition for things...shop owners and employees know that customers complain, but in the end they will have to come back to them.
Customer service also sucks because no one knows how long the shop will stay open...the next crisis can be around the corner, so that even if your customers return you might have to close the shop and open another similar one somewhere else a few months after the crisis.
Many of the big companies in Argentina were state owned until some years ago, everyone knows how 'efficient' they usually are. I think it will take years to change the corporate attitude.
Lastly, customer service also sucks in places like Spain and Italy. This could also give some strength to the cultural theory. Take for example Alitalia: state owned until recently, lots of iddle employees, incredibly bad customer service. Ifelt dealing with them very much like in Argentina.