Or, as was mentioned in the video,  the team has publicly stated some time ago (before sunset overdrive) that they would be targeting 30 fps for all future projects to push visuals.

After playing nothing but Metal Gear Solid for literally weeks, I definitely think I started to succumb to the same kind of effect that have more than a few PC gamers turning up their nose about 30 frames per second, as when I got back into the Witcher 3- which I'd played for many days before MGS5 with no issues- all the movements and animations just felt really... JANKY. o_o

But what bugged me about it was I realized that Metal Gear Solid 5 being at 60fps just didn't really make much of an impact on me; i.e., as someone coming from mostly 30fps games, I wasn't seeing this 60fps title and thinking 'Oh God... movements... SO SMOOTH. It's so BEAUTIFUL. T_T ' I didn't feel like I was any more proficient as the pew-pew sneak-sneak than I've ever been, there was no increased sense of immersion, I honestly just completely forgot the game even ran at 60fps. Literally the only significant consequence of playing MGS5 at 60fps was how jarring it was to get back into the Witcher 3, which just left me feeling kind of cheated.  =P It felt like, by playing a 60 frames per second title for such an extended period of time, I hadn't made my overall experience 'better...' I just made my experience with titles that ran of 30fps worse. 

Bright side is it didn't last; after a couple of days playing the Witcher 3 my brain seemed to readjust. =P I even went back to play Metal Gear Solid V for a few brief sessions, but even though- now that I was specifically looking for it- I certainly saw the difference, again, I still can't say it made my experience 'better.'

Still, I'd imagine that for multiplayer titles, and perhaps twitch shooters, it's probably a different matter. I was always pretty slow and methodical during MGS5. xP

Well they had unlocked frame rates and occasionally hit 60 fps.

There is a big difference between an unlocked frame rate that averages somewhere at 40-50 vs locking it to 30 fps.

Interesting. I never really notice frame rate difference from the perspective of onscreen action. However playing an online multiplayer game that can mean the difference between life and death in just a few frames 30fps is very different to 60fps, partly because it simply adds to the lag when added to ping. Controller vs keyboard aside it's one reason multiplatform MP between console and PC at a very high level puts console at a disadvantage. In theory consoles can implement KB+M controls for any game, so that can be overcome. But the top level PC players are playing at 144fps, which gives an advantage over 60fps, and the best we can hope to achieve on console is 60fps. When the professional competitive players are making milisecond reactions 144fps is important to them. They complain when their game craps out and only runs at 60fps. I totally lack that level of skill and my reaction time is so slow that as long as the fps is constant it doesn't matter too much. 

I haven't seen the video to know how much R&C drops from 30 when it does drop. But a 60 to 40 drop is huge, and noticeable and makes a game stutter. That's a 33% drop in framerate which is bad. If R&C drops to 20 (also a 33% drop) then that's almost as bad, but because its only a 10fps drop it's probably marginly less jarring. But if R&C drops to no less than 25fps then that's barely noticeable your point is totally moot. 

Finally got my copy, can't wait to play this later tonight.

Rock solid 30 fps like in Driveclub is just fine for me. There was no responsiveness issues in the Driveclub, so I was a bit surpriosed about the comment on R&C not being as "tight" ss earlier versions. Anyway this is day 1 for me.

One of the PlayStation series that I somehow just didn't get to the past few gens. I wonder if now would be a good time to start?

I don't think there's ever gonna be a better time than now.  You literally don't need to know anything about the series before playing this game.

Yeah, you're right.  I'll definitely check it out down the road.