And this is an excellent example of how subjective things can be. For one user it's a non-issue. For me, it's a significant issue in every camera I own, including my FX bodies.
>I feel >comfortable shooting this camera up to ISO3200
And I likely wouldn't want to shoot it past ISO 800-1200
>and will push >it past that when need to be get the shot that I would >otherwise miss. If it's a good capture, you can deal deal with >High ISO noise in post.
Maybe. But "dealing with it in post" means loss of detail, loss of color fidelity, and other issues. For some things, it doesn't matter a lot. For others, it's a significant issue.
>What is a more relevant issue at higher ISO's is the loss of >dynamic range. However, the DR of the D7100 is so broad at >ISO100, that the losses at higher ISOs are still an >improvement over an older camera at lower ISO.