“It’s difficult to say, as it’s still early days when it comes to drivers,” he told Edge. “With each new driver release, performance increases dramatically in some areas. The PlayStation 4 environment is definitely more mature currently, so Microsoft has some catching up to do. But I’m not too concerned about that as they traditionally have been very good in that area. The specs on paper would favour the PS4 over the Xbox One in terms of raw power, but there are many other factors involved so we’ll just have to wait and see a bit longer before making that judgment.”
I'm sure this won't have any affect on any potential buyers of the PS4 or Xbox One, but it's always interesting to hear things regarding the new system's power, now if only Nintendo would release the specs for the Wii U.