Valve do however have the disadvantage of (largely) being their own publisher, so they give themselves leniency with deadlines. However EA is their console publisher and I think they've had some impact on them, what with L4D2 coming out exactly a year later.
I wouldn't compare them to 3D Realism with DNF either. They did release Team Fortress 2 eventually, even if it took 9 years.
I wouldn't compare them to 3D Realism with DNF either. They did release Team Fortress 2 eventually, even if it took 9 years.