I would still think it would be a faster exiting process than on a commercial airliner, no matter the size of the airliner. Although, I cannot support my statement with real hard evidence nor experience.

However, I have seen some companies using counter-rotating rotors on their aircraft; they say that it improves the thrust and allows for smaller rotors. If I were to redesign this concept I would like to replace all of the rotors with a counter-rotating system...

This is a really cool idea so far.