I would definitely agree that my mousing is not as efficient as an expert-level keyboard only approach. But it's what I do and what is comfortable to me. Random text selection in big bodies of text is always easier (for me) with a mouse first, trackpad next, keyboard last.

Keyboarding, mousing, editing is a very personal thing to folks who have to work at their computer all day. Lot's of different ways to work, lots of approaches to the work. Each person has to find their comfort zone.