I have to laugh a little at this. You just said, "Go through these 2 tutorials, and try out this tool, and then you'll be able to re-read the introduction and understand it (90%)!" I've learned Source Safe, Perforce, and svn in a matter of hours without having to re-read anything. It's absurd to have to watch 2 tutorials and read an additional book twice to understand something that you should basically already understand. Someone really needs to fix this!