@pickpocket Princeton does consider Freshman Year Grades (according to Princeton rep). This myth has been discussed before on CC and most recently here: http://talk.collegeconfidential.com/princeton-university/1934062-does-the-highschool-you-attend-matter.html#latest
It did appear in the early 2000’s they tended to ignore Freshman grades, but no where on the current Princeton website is this policy stated. Stanford, that does have such a policy, explicitly states it in several areas of their admission website.
Better to assume that they do consider, or better yet, call to confirm.