As much as I believe that AMGs are given a preference over IMGs for a reason, I do not think this should be the case. While reading his forum, I've stumbled over a couple of posts by people who have over 300k in loans, due to having o repeat years of school, had multiple failed usmle attempts, etc, and I have to say - even if one of those people (I dont want to point to anyone particular here, so let's just stick with the general type) manages to graduate and gets a guaranteed residency spot, I am going to be really worried, cause there is no way I want such a person to be treating me or any of my relatives.
And I do not think that any of PDs really cares about how much any of AMGs has in loans, that is not their problem, that is not relevant to them. They just want to hire someone they know will do got, wont screw up their patients. US Med school gives him somewhat of a guarantee for it's graduates, so he naturally prefers AMGs. On the other hand, if there would be an IMG that he is for some reason sure of, he might take that IMG over AMG easily. That's just my opinion.
The other thing - most IMGs are paid so little in their countries, that a loan they took to pay for the steps is, in terms of paycheck ratio, comparable to the loan you have after medical school. Not saying that you or PDs should care about this, just wanted to give you another perspective on this question.