@Galvston very well observed.
Although some things need a bit more explanation.
From my experience and I drive and test a lot of different Cars and Tuning Setups, all I can say that it all depends on the Brakes Type and of Course the Brake Pads.
The entry Class Road Cars let’s say up to 300hp for example come equipped with Production 08/15 Brakes which require lots of Brake Pressure to lock the tires up with ABS Off.
The faster the Cars become the better the Stock installed Series Brakes become and like you mentioned the Lock up Treshhold Point becomes closer with ABS Off.
Of course this requires a more delicate and fine Brake Modulation.
In GT1, LMP Cars or Formula Cars the Series Stock Brakes are already High End Stuff which requires the most possible fidelity and fine Control on the Brake Pedal with ABS Off.
I‘d only advice to use very stiff Load Cell Pedals with a high Brake Pressure to drive these Type of Cars with ABS Off.
Otherwise you’ll leave Skid Marks as soon as you just think about breathing too much on the Brakes.
You can easily see and test the following for yourself to prove my Point.
Buy a Stock Production Car and just play around with all the available Brake Upgrade Parts.
Actually you can do this with all Types of Cars.
You‘ll immediately notice the difference and Change in Brake Performance with it whilst only using ABS Off.
Then do the same with ABS weak and in the End with ABS Default.
The Lock up Treshhold Point is going to Shift with each upgrade, the stopping Distance is going to shrink.
In the End it’s all just a personal Preference.
ABS Default is NOT the fastest ABS Setting per se.
It’s just the most safe way to hit the almost optimal Brake Pressure more easily executed no matter the equipped Brakes Type might be.
It’s a Crutch an Aid to give Players a more relaxed way to enjoy the Game.
Same goes for the other Driving AIDS in Game like Traction Control, or Automatic Stability Managment.
You can be almost equally fast with or without them.
The differences in Lap Times are almost neglectibale.
At the end of the Day it’s up to you what you want to experience.
A more forgiving Driving Experience with some sort of Assistance which lets you get away with sloppy inputs or a very precise and clinical approach with all Assists turned off.
I personally raced against People who were equally fast same like me with all different sorts of assisted and non Assisted Driving Helpers.
It’s about finding out what works and suits your current Skill Level and then adapt and refine its Limits.
But I GUARANTEE you, that ABS Default is NOT the fastest Setting.
It’s just the most easiest way to be consistently close to the most available Grip Level throughout the whole Range of available Cars.
ABS Weak for me personally is the way to go as it gives me the shortest Stopping Distance in Combination with the most precision in Car Rotation.
The shortest Stopping Distance I get with ABS Off but only with Low Powered Road Cars, as I’m not capable to hit that optimal Treshhold Point repeatedly.
And I’m absolutely convinced that if others would actually take their time to consciously test by themselves what I’ve tried to explain they would than truly get an understanding how the ABS in GT7 is designed.
A System like ABS Default in GT7 is non existent in Real World, the way it’s designed and the way it works is designed to support the Player.
Of course I understand that if People see all the YouTubers using nothing but ABS Default they also use it and believe them to be the fastest Method.
And to a certain Degree it might be true that an average Player like me for example achieves the best Results with it.
But I can achieve the same if not slightly better Results occasionally with ABS Weak too.
It’s all about perfecting your Inputs and dedication to a specific Input Method.