Seems to me the article linked in the OP didn't really say much. It calls it a crisis that Nissan has revised its sales figures for 2011, and claims (incorrectly) that Nissan expected people to have L3 chargers at home. The article mentioned none of the screw-ups that have made me angry, and that I've posted about elsewhere.
As to the customer service business, I agree the center is definitely not in India. Some companies do have CS in India, and the accent is extremely distinctive. As for "accent neutralization," it is possible to train someone to a very good imitation of an accent, but the cost in time and money is great. A movie company can afford to train the star to produce a desired accent because it has a very large budget and creating an ambiance is at the heart of what they are trying to do. But to train a whole room full of native Hindi speakers to sound American to American ears would be beyond the budget of any customer service department. The rare individual can achieve it, but we're talking about a whole service center. (I once met a Mexican who spoke with an almost-perfect American accent because he'd studied in English-speaking schools and watched American satellite TV all his life. Then he pronounced Winnipeg as weenie-peg and the illusion was lost.)
What's much more significant than the location of the service center is the fact that the service agents give us nothing but lies and promises, either because they are instructed by Nissan to do so, or because Nissan does not give honest information even to its own service reps.