If you've ever played DotA, then you know that you don't get the message inside the blue loading bar "Press any key to continue", it goes straight to "Waiting for other players".
I've heard that it shows if the map has too much loading screen text - then the game waits so all players can read it. I'm not sure about this, but you can easily test - just try a map with no text on the loading screen and see if it gives you any "waiting for players".
Use a custom loading screen? Make a new loading screen and import. Do not include text from WE. Put in the text while making the image. It should bypass the press any key thingy..