The hobby jogger label isn't based on time, it's what you do with your running. Hobby joggers just do fun runs and try to win the costume contest, if you are serious about consistent training, improving PRs, and beating people, you are not a hobby jogger.
This is how I feel. There are different levels of hobby joggerdom. Someone tht runs in the 18:xx range and trains consistently is more of a "runner" than the 30 year old male that runs a 28 minute 5k with his giant headphones on. One is actually training and competing in a sport