I discovered that WordPress does not support Google Analytics. Not even if you have a paid account. For my blog I could care less: I keep it mostly for myself as a tool to preserve some thoughts and information, or direct people to specific post, when I need to share something with them… But when tracking visitors is important (e.g. somebody’s own business blog), paid WordPress blog is not a good option at all: for approximately the same amount of $30, you can get a hosting (such as iPage or GoDaddy) with WordPress support, and then configure Google Analytics or install a plug-in.
The blog of the WordPress staff in that thread (she doesn’t disclose her name), however, is pretty useful.