Could you share the question with us?
Forgive my skepticism, but I have been battle-hardened by some pretty bad horror stories.
I work at a Big 4, we see a lot of fresh graduates coming in every weeks or so.
To give you an idea of how bad it can be: a group of technical recruiters took the decision to "tweak" one of the interview questions we are asking during on-sites. They thought the change was benign when in fact it made the problem NP-hard, which is you know... pretty "tough" to solve under 45 minutes (or without a lab, a research team and 20 years). Of course, all of them were baffled by the fact that none of the candidates were performing well on this "trivial" question.
It took us three engineers, and two interviewees to make them acknowledge, and understand their mistake.
A big waste of time for everyone.