I hear you, when I discussed this with Jeff he said this was "Micro Optimising".
From the 300 or so edits I reviewed there were a handful - a tiny tiny handful of edits I was unable to deal with. One such edit I remember clearly is this one. Being an OK Ruby developer I can deal with many of the Python edits, however this particular one had some Python syntax I was not familiar with. My call on this edit was, skip, let somebody else deal with it.
The interesting thing is that the vast majority of edits I approved were in tags I am not expert in, fixing phrasing, typos and code snippets has a universal quality. In general I find that having lots of experience on our sites is actually more important than being a tag expert, when it comes to approvals / rejections.