I did get asked about my dexterity skills at a couple of interviews. However, they never looked at my app and asked about the ones I listed, just generally asked about them.
I have a lot of "technical" dexterity skills (soldering, welding, machining) that I highlighted on my application and in interviews. At one interview I did get a follow-up question purposely asking about shaping and forming media. I think cake decorating is an awesome skill that highlights that ability!
Fun story: As the fall semester was winding down and then over the holidays I learned how to knit and completed a few projects. It wasn't on my application because it was a newly acquired skill. I had an early January interview and at one of the open-ended "What are your hobbies?" type questions, I reluctantly brought up that I had been knitting a lot lately. I'm a 6'3", 250# guy with a beard, so I got a shocked response of "Really!? You knit?" Come to find out, the interviewer was a huge knitter! We spent the next few minutes talking about some projects and how we both got into knitting and made a really good connection. Well, my interviewer was one of the top three admissions committee members and I was offered acceptance on the spot!
Point of the story: Every applicant at an interview has cleared the academic hurdles for acceptance. After that, they are just looking for strong personalities. You never know what random aspect of your life will click with someone on the other side of the table. So keep developing new skills and talk about them.
