Like most of us here, I’m skeptical of this “1s faster than 2022” claim that’s bouncing around. I think there is a definite chance that the car will be faster for sure, but a full second would be something special.
In years of stable regs, a one second gain would be impressive for a front running car. I know the article mentions some possible reasons as to how this is done.
One detail I think might be overlooked is the new Pirellis, which should dial out understeer. This could change the car balance and from that you can get quite a lot of lap time.
At RB, for example, the RB18 was understeery at the start of the year, and Verstappen and Perez were close to each other and about on par with the F1-75 or just behind. Suddenly RB dials out the understeer and Verstappen finds 0.3-0.5s per lap on the other three drivers, relatively speaking. Ferrari could see a similar benefit, as will a lot of the grid.