It is soooo hard to design a good multiple choice math test. I am trying to do exactly that right now, and resign myself to knowing that it will just be one non-comprehensive piece of evidence.
I did not-so-well on the math subject GRE myself. It was the first time I'd done multiple choice higher(ish) math questions and I just didn't train to triple-integrate fast enough or answer questions about the properties of ring homomorphisms. Write a proof? Sure! I did fine actually getting the PhD. I also placed into 'remedial' math at Caltech according to their placement test; fortunately they let me switch out and up in the first week as it really wasn't appropriate.
I did not-so-well on the math subject GRE myself. It was the first time I'd done multiple choice higher(ish) math questions and I just didn't train to triple-integrate fast enough or answer questions about the properties of ring homomorphisms. Write a proof? Sure! I did fine actually getting the PhD. I also placed into 'remedial' math at Caltech according to their placement test; fortunately they let me switch out and up in the first week as it really wasn't appropriate.