As usual, the rc2 release is pretty small. People are taking a breather after the merge window, and it takes a bit of time for bug reports to start coming in and get identified. Plus people were probably still on vacation (particularly Europe), and some people were at Open Source Summit NA last week too. Having a calm week was good.
Regardless of the reason, it's pretty quiet/ The bulk of it is drivers (network and gpu stand out), with the rest being a random collection all over (arch/x86 and generic networking stands out, but there's misc stuff all over).