[eluser]Dan Storm[/eluser]
It's difficult to see why this should be done - for several reasons.
Applying a prefix like
mvc_ would only solicit debate and arguing what a better/worse alternative would be.
Enabling a configuration setting to manage the prefix, so that anyone can have any prefix they want, makes the possibility redundant as most wouldn't change this anyways, since most developers can comprehend that Models is in the model folder, views in the views folder and lastly, controllers in the controllers folder.
Documentation will be a bitch, since anyone could prefix the MVC folders with any name they want. And handing over such projects, kind of works away from the purpose of using well-documented frameworks who works with doing things in a documented way.
I could go on, but that would force me to do what I initially said this would do; solicit debate and arguing.