MGS4 -9 hours of cinematics, 21 hours gameplay=30 hour game. Good or bad?

[Euphoria14]

MGS 4 has alot of questions to answer as they are trying to tie up all the loose ends in terms of Solid Snakes story. I do not see why 9 hours of scenes is bad.

Now we have people saying it should have been longer, what is wrong with 21 hours of gameplay? For a MGS game, that is a lot.

I am very much looking forward to this game even more now knowing this information.