Okay, BUT -- on MAX settings (with anisotropic filtering and antialiasing off at 1920x1080 with graphics card set at 1080p for desktop) I am getting 35-45 average around the island and in busy scenes, like the one pictured, I am getting 25-35 average with a girl in dialogue, a busy background scene with custom building and many points of interest, and a second girl deciding an animation then walking through the shot in the back.
However, upon occasion I am still getting brief hangups, major and minor slowdowns, and FPS drops down to 9 (on Max settings, all in game graphics options on, quality 4 setting)
All-in-all, I would say that it helps with stability if you are getting a lot of spikes and likely improves your average FPS slightly overall, but kills highs. I would still suggest trying it out... I am sure system to system you will see vast differences and new anomalies though.
EDIT: Also note the aliasing doesn't actually look as bad on the game screen as this screenshot, I was lazy and used Paint to make a quick JPEG.
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