Skeleton slider Yarnold arrived in Sochi ranked number one in the world after claiming the World Cup title with four wins and three podiums in eight races.
Jones won Britain's first-ever Olympic medal on snow with her third place in the women's snowboard slopestyle and Yarnold has been posting some impressive practice time at the Sanki Sliding Centre.
"I was at the slopestyle and I was in awe. It brought tears to my eyes. It's what we train very day for," she said.
"I've always been such a determined athlete since I was about 13 years old. I went to a grammar school because it finished at 15:30 so I could train every day. I love sport, I love training hard and I'm here to do my best.
"I just want to go out there and show the world what I can do. I just really enjoy competing and that's the only way that I'll keep doing well, to relax, enjoy it and embrace the pressure. It's a real honour that people can think we can do so well."
Team-mate and world champion Shelley Rudman also claimed the early medal puts the entire team in a positive frame of mind - as Team GB look to secure their best performance ever at these Games.
"It was incredible, there's a really good vibe in the Team GB camp and I think it's really uplifted the whole team. We're really proud," she said.
- Sports & Recreation