The example given contradicts itself. The comments in the code claim `.navbar-collapse` will be hidden until 768px+ wide, but the line beneath uses `.nav-collapse`. The latter seems to actually work with the collapse plugin.
<!-- Be sure to leave the brand out there if you want it shown -->
<a class="navbar-brand" href="#">Title</a>
- <!-- Place everything within .navbar-collapse to hide it until above 768px -->
+ <!-- Place everything within .nav-collapse to hide it until above 768px -->
<div class="nav-collapse collapse navbar-responsive-collapse">
...
</div><!-- /.nav-collapse -->