What does a level feeling of "Your voice echoes in here..." indicate?

A few times now I've entered a level in the first area and the text "Your voice echoes in here..." shows up. While I've had no success finding answers to this question online, this appears to be a Level Feeling, which was present in all games.

My guess is that there might be some sort of secret exit, and that it's located via the underground tunnels. When entering a tunnel I did hear a bit of a windy echo effect, but I wasn't able to reach the location it was coming from to confirm my theory.

What does a level feeling "Your voice echoes in here..." indicate?

Solution 1:

in my experience it makes the level about two times as big as normal

Solution 2:

I asked this question in the Steam forums and I got a reply saying it just makes the level bigger than usual which seemed a bit disappointing. I was thinking like you it might mean some sort of cool secret is around.