I'm going to defend English Lit.
I (like PennyRoyalTea) got an A* at GCSE and did it at AS level (AQA) and found it the subject that I didn't need to worry about at all. The books (apart from Handmaid's tale) were quite fun, interesting discussions, homework in essay form wasn't bad, bit of extra research, nice coursework content, not much revision required.
Maybe its a bit like maths, where you can also get an A* at GCSE and struggle at AS level. Basically, if you're the sort of person who can knock out a good essay, interpret things, and make sure that you stick to the question being asked, you'll do ok. Quite a few people in my class got A's (some lower than others) and nobody absolutely failed.
Then again, I'm biased, I just love English.