I think it comes down to a couple tangible, measurable metrics: language barriers and time of work barriers (ie you send an employee an email and the reply back

I think it comes down to a couple tangible, measurable metrics: language barriers and time of work barriers (ie you send an employee an email and the reply back at 2am your time). Then, I think anecdotally, quality of work is another perceived advantage for not going with the complete outsourcing route.