If the reviewer doesn't know enough about source control to fairly quickly find the most recent activity date, is it likely said reviewer is competent enough to review the source code itself, or even spend time reviewing it in the first place?
On the other hand, think of a candidate that is able to identify a relevant piece of information, and willing to do a little extra work to display this info where the people who need it can easily find it. In my opinion, this is a sign of strong soft skills and general common sense.
I'd be scared if someone were to look at a codebase of component-type-X codebase with a find-fault-fast attitude, if they didn't have extensive experience in designing and building components-type-X already. It sounds like diving head-first into a Dilbert strip or DailyWTF story.