This is a real indepth interview from Gamasutra with Yoshinori Ono on Street Fighter IV.
One thing that seems to always come up in these interviews is Street Fighter III and how "complicated" the game play system is. The thing is, after spending a month or two with SFIV myself, I actually think the Focus Attack system is far more complicated than the parry system in SF3.
If you watch some of the newer videos coming out, a lot of top players are making good use of it but the actual inputs for a focus attack dash cancel among other things are much more complicated than just tapping forward or down for a parry. I think a lot of casuals and journalists do not realize this yet and the game is still being presented as a "simpler street fighter, a rewind to Street Fighter II".
I think once the game is out on console and people start playing others online who have had time with the game they will see this.
Of course you can play the game SFII style, but to do real damage in this game you must utilize the focus attack dash cancel system. We'll see how it plays out.