The fact that she runs the 100m, 200m, and 400m, which are sprinting events probably also has a lot to do with it, as sprinting has much more publicity, compared to an athlete running an 800m, let alone a 10k. Look at Usain Bolt vs someone like Bekele or Cheptegei. When you talk to average people, they know Bolt, and usually don't know Cheptegei.