Do you ever worry about people having lied about your skill level?

There are a lot of people out there who think they're much better at things than they are, whether that be drawing, singing, etc. different skills. People joining competitions thinking they're definitely gonna go to the next round only to be given a harsh reality check. I figure it probably comes from people complimenting them either as a form encouragement or to be polite.

Do you ever wonder if you're actually good at the things you THINK you're good at, or if everyone's been lying to you?