[davidmanze]

Maybe you should increase your choice of lens reviewers, dave. Photographylife has test results (= numbers! written! conclusion!) of 35/1.8 S, 24-70/4 S, 14-30/4 S, I'm not sure about the last 24-70/2.8

https://photographylife.com/reviews
https://photographylife.com/reviews/nikon-z-14-30mm-f4-s
https://photographylife.com/reviews/nikon-z-35mm-f1-8-s
https://photographylife.com/reviews/nikon-z-24-70mm-f4-s

Aaaaand one more thing: https://photographylife.com/reviews/nikon-z-50mm-f1-8-s

   Thanks for the link JoJu!

  

A quick glance at their charts for the S shows moderate bar graphs for the corners, decent for the borders and exceptional in the centre.....
 ...then insteps the colossus the Art 50mm F1.4 ..... a more than respected lens   ....... and low and behold the Nikkor S holds it's own very nicely and does better in the corners ...... only losing by a bit in the borders stopped down.

 There is the question of price though ..... the Art  can be had for around 700-800 euros (even 665 euros grey market)  ...... the Nikkor is around 650 euros ..... but with a stop more light, better bokeh and given it's proven track record (PDAF apart) the Sigma looks the better deal.... adapters aside of course.

  So it's a question of size and weight of the Sigma (plus it's adapter) vs the Nikkor and less to do with cost..... my guess is most will opt for the Nikkor S.

  The Sigmas are also coming down in price too ...... the 85mm F1.4 Art can be had for 820 euros ........ surely a bargain!   ....

  So the Nikkor S does very well ...... much better than the Nikkor G by far!

https://www.flickr.com/photos/124690178@N08/