After the first day of testing almost nothing can be said. Regardless, I'll give my 1st day verdict.
The field has gotten closer not further apart. The teams converging pretty much on the jet fighter side pods, curved diffusers, and generally shrink wrapping the car. Only question mark is Williams, so far I can see the field covered by 2 seconds nose to tail.
Big improvement from McLaren over last year. This year's car already faster than last year's. Much more reliable much more planted, sector 3 was ok so still some work to do.
The height of cultivation is really nothing special. It is merely simplicity; the ability to express the utmost with the minimum. Mr.Lee