The specificity does not derive from my post, but from the source of the tests that you are arguing against being fixed, viewable by all, and well documented. The traversal tests seem like very reasonable cases to me. For example:

// test 1: NodeFilters and Exceptions

// test 2: Removing nodes during iteration

// test 4: ignoring whitespace text nodes with node iterators

// test 5: ignoring whitespace text nodes with tree walkers

I just wanted to know if you had something in mind or were just making vague apologies for the IE team. Either case is ok with me.