Does anyone else do actual SolidWorks testing during interviews?

We have started doing this recently, and I have had surprising results. I used a simple prismatic part from an early CSWP exam, to see how close users can come to creating the part. The candidate has 30 minutes to build the part. Of all the interviews I've given, no one has come close to getting it correct. Some never claimed to be good at SolidWorks (we typically hire on engineering skill first, CAD second), but today we are hiring a consultant who needs to be able to walk on and be proficient.

Is it interview stress, or do people really inflate their resumes that much? I gave the part to a coworker that I would consider well versed in SolidWorks (a good candidate to take the CSWE), and he completed it in 20 minutes, perfectly.

What are your interview experiences?