Sorry lljkk, that comment was in response to "the main thing required to get into a US uni (not necessarily Ivy League which is usually all MNers talk about, just like of course Britain doesn't have any Unis other than Oxbridge either, right?) was $$$$$$$."
I suppose that I assume that people in the UK would not be thinking about US universities unless they offered something above and beyond their local universities, thus their criteria would assume an academic minimum - not just Ivy League, but also including MIT, Stanford, Cal Tech, Northwestern, U Chicago, U Michigan, Washington University, Duke, Georgetown, CMU, Pomona, Amherst, Williams, Swarthmore, Middlebury, Wellesley, Haverford, Claremont McKenna, Johns Hopkins, Rice U, Notre Dame, Emory, Bowdoin, Carleton, etc. here is the link again.
I do agree that people here are not aware of the quality and reputation of the colleges and universities which I listed (all are top 20 Universities or Liberal Arts Colleges), and if looking at American Unis, these are ones I'd also consider.
Regarding the case study you linked to, in terms of Financial Aid, Princeton is a needs blind school, thus the financial aid office must have concluded that it was reasonable for her family chip in $48K (not much different than what her parents were paying for Cheltenham Ladies College). Had her family income been less, they would have found the money to fund her. I know how these packages work, and they would not have a student work 20 hours a week! I did mention above that Harvard (thus the other Big Names) will give a full ride (including travel and living expenses) for UK residents with families earning less than £75,000. Additionally, there are specific scholarships giving full rides to UK residents at these institutions (Harvard has 2 geared specifically to state school students).