17% get 4+ on Lit; 31% get 4+ on Lang. Of course, other than personal stories, it’s difficult to discern score distributions of students that take both.
One key element about the English exams is that many colleges give credit for Lit or Lang, but not both, even for those colleges that don’t cap AP credit in general. So I really don’t think any college is ever surprised when a student opts not to take the exam