User blog comment:Bovell/UPDATE: Battlefield 3 demo not yet confirmed/@comment-2195984-20110420233053/@comment-3032061-20110422174620

Actually, using the same engine since 2005 doesn't matter. For example, look at the Source engine. It has been used since 2004 and almost every game made on it has one awards. Counter-Strike: Source, Half-Life 2, Half-Life 2: Episode 1, Half-Life 2: Episode 2, Team Fortress 2, Portal, Left 4 Dead, Left 4 Dead 2, and now Portal 2. All you have to do is upgrade it every release which the CoD series isn't the best at. CoD World at War seemed to have downgraded graphics compared to CoD4. MW2 was an upgrade but it feels like Black Ops downgraded it again. I'm not sure if I am the only one who notices this but it looks like it to me.