Imaging Resource has posted Nikon D7100 samples using their standard studio scene, which facilitates comparison with other cameras using their comparometer.
Nikon D7100 Hands-On Real World User Review
Nikon D7100 Shadow Recovery
Importing D7100 Raw Files Into Lightroom
Nikon D7100 Real World Dynamic Range
Nikon D7100 Low Light Teaser
Nikon D7100 FAQ and Helpful Links
Nikon D7100 High ISO comparison with D7000, D600 and D700