Not sure if this has been discussed here, but from the notebookcheck:
MBP 13" (nTB): avg. 564 nits
MBP 13" (TB): avg. 542 nits
MBP 15": avg. 465 nits
MBP 13" (2015): avg. 342 nits
MBP 15" (2015): avg. 315 nits
http://www.notebookcheck.net/Apple-MacBook-Pro-15-Late-2016-2-6-GHz-i7-Notebook-Review.185254.0.html
http://www.notebookcheck.net/Apple-...Hz-i5-Touch-Bar-Notebook-Review.185639.0.html
http://www.notebookcheck.net/Apple-...without-Touch-Bar-Laptop-Review.182374.0.html
MBP 13" (nTB): avg. 564 nits
MBP 13" (TB): avg. 542 nits
MBP 15": avg. 465 nits
MBP 13" (2015): avg. 342 nits
MBP 15" (2015): avg. 315 nits
http://www.notebookcheck.net/Apple-MacBook-Pro-15-Late-2016-2-6-GHz-i7-Notebook-Review.185254.0.html
http://www.notebookcheck.net/Apple-...Hz-i5-Touch-Bar-Notebook-Review.185639.0.html
http://www.notebookcheck.net/Apple-...without-Touch-Bar-Laptop-Review.182374.0.html