What I know about wrenches could fill a small toolbox. What these guys know about wrenches could fill a large warehouse.

They are the folks who belong to the Garage Journal forum. I wouldn't go to them to learn about power tools but they know just about all there is to know about mechanics tools. Here's what a senior member has to say about wrenches. Of particular interest is the chart posted by Joe B. (it's about half-way down the page) that shows the relationship between the number of teeth in a ratchet and arc swing. The relationship is not linear so there are diminishing returns to adding more teeth.