Yes, it can also vary depending on stature and frame. I have met people who dead/squat the same. I also know people who squat 2-300lbs more than their dead lift. I should add that they pull some pretty amazing numbers.
I would say he does train legs by his quad development. He is most likely training shoulders,tri and traps if you notice the "pumped" areas. I bet he is a lot more proportionate than you think.