Basically, it's the same as the rest of the test in that way. E.g., if you correctly identify one DS statement as sufficient but not the other one, you don't get half credit -- it's still wrong. Or, if you have one of those I/II/III problems in the multiple-choice section, getting 2 out of 3 correct is still ... wrong.
But, sure. Seven out of 12 on the IR is pretty good.