Does vim always happily tell you that its running? It used to be the default diff tool on devices I worked with and IIRC it was just a blank shell in some cases, so it might be non-trivial to work out if you're in it, without knowing it.
So yea, its probably interesting as a challenge but it doesn't prove shit, outside of "you like vim". I like Jetbrains products but I wouldn't assess someone's ability based on how someone might use the products, but rather what they create by using them.