This is a lot of APs. Whether it is too much will depend upon the student.
For me personally, AP Literature would have killed me, AP Drawing would have been a disaster, AP Economics would be fine, and AP Calculus would have been a walk in the park.
However, you are I are different people. What you can handle and what some other student can handle may be quite different.
You do not need to load up on AP classes in order to get into very good universities. There are a lot of very good universities in the US.
I do think that trying to figure out how much of a heavy academic load is right for each student is a very tough thing to predict in advance.