I agree she shouldn’t be worried about a B or two freshman year, but where did you see Princeton does NOT factor in freshman year grades? I don’t see that anywhere in their admissions site.
In the above text, it seems to me they consider ALL information, e,g. freshman grades. The above and my conversation with a Princeton admissions rep (at the school) gives me the belief that they DO consider freshman year grades.
I’m willing to be corrected, if you have a source for them NOT looking at freshman year grades…