There is judder under 60fps... play Far Cry 3 and set the settings so the framerate bounce between 30-40fps, you will notice some kind of micro-stuttering judder most noticebable if you look at the ground textures and not in the distance.
Why would DF try to downplay PS4 to Xbone, they have been shitting on Xbone since day 1.
When you're under the monitor's refresh rate, any increase in FPS actually REDUCES the frame variance. It doesn't cause additional "judder". It's my opinion that DF has exaggerated negative impact of variable FPS on certain PS4 games, so that it doesn't seem like all they're doing lately is putting out graphs condemning the Xbox One. I think it's something meant to sound more neutral, but it's clearly confused some people that don't understand the data.
The "Micro-stuttering" on ground textures you've had in Far Cry 3, might be something to help illustrate my point. I think that you're talking about the same kind of "judder" I am, and it's something that's more impacted by lack of proper V-Sync and Triple buffering, and not a locked FPS, which would have zero effect on the situation. If you force triple buffering and Vsync in Far Cry 3, the "judder" is significantly reduced.
Which is why I think the comments on Second Son are disingenuous, in regards to the "judder". I think the author felt he was coming across overly positive, and felt compelled to question the variable Frame Rate, which is clearly using Triple Buffering, as we can tell from ZERO screen tearing with a variable FPS.... which would mean that frame rate going over 30 would only REDUCE frame variance, and REDUCE judder.
I'm calling BS on a BS comment is all. They made this same mistake in the Tomb Raider analysis, and I'm actually pretty annoyed with DF for it. They need to be more careful with just giving facts, since small comments they make seem to confuse the living hell out of some people. No offense.