As someone doing management in a company that hires many Indian workers, both in on-shore and off-shore teams, this is a highly relevant topic for me.
I'm a native western european so I'm likely blind to some extend for these issues. Like the article says, this sounds like harmful class-ism that silences or disadvantages specific groups, but not in an "obviously" racist manner based on skin color.
Anyone care to share some real life experience? Was this a problem in your workplace? How did you detect this was going on, at all?