I am afraid these boilerplates will be an excuse for many not to learn a thing about what they are doing, like we had XHTML doctypes slapped onto the pages (or place there by IDEs).
<!doctype html>
<title>Hello World!</title>
<p>insert important message to world here.I finished the first iteration of a project recently, using HTML5Boilerplate merged with HTML/CSS purchased from ThemeForest. Even though I'm pretty well familiar with HTML5 and ended up pruning a bit of the boilerplate that wasn't necessary for my project, it was still a very welcome jumpstart.