You don't need to touch the .ini file in the Steam folder. Only the one in the game-created My Games folder. IF you even open the launcher settings after ini editing something off that isn't able to be set in the slider area, it defaults. You can rename the game's Fallout4.exe to Fallout4Launcher. exe and you'll avoid any accidental resets of .ini values, plus it'll load directly to the game. You CAN disable vsync + remove the game's hard cap with the .ini adjustment, but you need to run a software FPS limiter. I'm using EVGA Precision X 16's FPS limiter and set it's value to 61 FPS and nearly 150 hours later, haven't had any issues and game stays around 60 FPS (GTX 970 MSI Gaming 4g, 8350 @ 4.4Ghz). I noticed camera controls smoothed out greatly doing this.
The article doesn't seem to mention if the test was pre/post patch. Pre-patch, game ran solid at 60 with 100% default settings of Ultra with High God Rays @1920 x 1080. Heavily intense panoramic scenes like looking at a city in the distance from atop a highway overpass, saw mid/upper 40's.
Post-patch, FPS started tanking horribly. Now mid 50's to 60 was norm outdoors, with lower 30's on same panoramic setting. And this was AFTER lowering shadows and God Rays to high (had been playing with GR at ultra) as well as shadow distance. Really intense areas saw some high 20's. This was with most current video driver too. And I'm running k-boost with mild OC, and PSU is 1000w EVGA Gold. Also increased grass to 35 to make that less demanding. Toggling grass (TG) OFF altogether might help lower end systems greatly and easy to do in console and easily reversed.
While game is playable, it definitely needs to be fixed back to pre-patch performance levels. Still have an issue with extremely slow texture fill rates on objects immediately near the character where it seems to load a Low texture setting 1st, then slowly changes to Ultra, and is very distracting. Was worse with day-one patch.
Also, if you have an original Fallout4.exe from before the patches (I saved mine prior to opting in to the BETA patches), remove the patched launcher and .exe to safe place, then make a copy of pre-patch .exe. Rename pre-patch Fallout4.exe to Fallout4Launcher.exe, and put it in the game's folder where the originals were. You'll get some of the pre-patch performance back. Surprisingly, it IS compatible with post-patch saves and game doesn't gripe about version numbers like Skyrim did. Make SURE to have back-up saves before trying this just in case something changes. Steam also won't overwrite this. To be safe and prevent unwanted overwrites, start steam in offline mode or disconnect your modem cable (steam acts differently with cable unconnected vs. blocking in firewall). But again, I've yet to have this change since manually opting in to the 3 BETA patches. And yes, they did change something with the pre-/post .exe as their sizes are different.