What is the lowest % of personnel from the US so that the company still keeps the US look and feel?
If there is a team of 20 people in India/China/Mexico etc, led by 1-2 people in the US, the US folks are still the most visible and make the most of the decisions (and probably also most of the work...).
But if the amount of US workers becomes "homeopathic", will it still work? What if there is suddenly no US "face" to represent those non-US teams?