So anyway, Imaging Resource has rolled out the Image Quality segment of their A7S review.
Sony A7S Review: Now Shooting! - Image Quality
In the print quality section of the review I'll paraphrase their recommendations as:
24 x 36 inches from base until ISO 400
20 x 30 at ISO 800
4 x 6 all the way up to ISO 51,200.
I was curious if anyone printing with the A7S would care to comment on these guidelines. Specifically the maximum size at base ISO.