Nobody said that Indian developers are worse than average. Just that there is a big difference if you take cheap Indian developers instead of expensive Indian developers in terms of cost per head, which is why you say that you picked the cheapest Indian developers. Not sure why you would read that as if Indian developers are worse, it is really hard to read it that way. I guess people here just react because it is fun to react, but it really just reads as if they picked the cheapest among Indians and no how Indians relates to other groups at all.
And by Indian developers most likely they meant developers stationed in India and not ethnic group, as location is the main degerminator of cost. So the description was for the cheapest developers you can find in India.