I'm not so sure about that. I got, and posted about one that was not in any of the study materials so I assume it was new. It was about instrument currency requirements and was so confusingly worded, and the only choices that weren't obviously wrong had such utterly stupid, ambiguous wording involving "required iterations and repetitions" that I ended up just giving up and guessing. I got it wrong, of course, though I think I understand the currency requirements pretty well. Questions worded so that you have to be a code-breaker to decipher them seem to be something the FAA cranks out quite regularly and, I can only assume, quite intentionally, up until at least two years ago. I doubt they've changed their ways since, though I'd love to be proved wrong on that.