My first posting actually needs to be changed because it only related to undergraduates.
Since you are a grad student, the special NY rules related to undergraduates would not apply. Instead you would have to look at the basic rules for determining NY residency.
You had a place to stay (abode) in NY for at least 11 months and you were actually in NY for at least 6 months. Maintaining an abode would be the same for both a US citizen and a foreign national as it related to the NY residency test.
