I believe Gruber's argument was not that Tim Cook has more influence than he did before, but that because Apple is much more mainstream today than it was a few years back, its operations are larger in scale and logistics become increasingly important as the company pushes millions of products. Better logistics pipeline allows Apple to compete on price, which is impressive considering that Apple has always been perceived as a premium brand.
I believe Gruber's argument was not that Tim Cook has more influence than he did before, but that because Apple is much more mainstream today than it was a few years back, its operations are larger in scale and logistics become increasingly important as the company pushes millions of products. Better logistics pipeline allows Apple to compete on price, which is impressive considering that Apple has always been perceived as a premium brand.