I'm definitely not more experienced than most, but I've always found myself weaving in and out of frameworks and libraries when I develop to the extent that any Bootstrap tools I've ever used as a starting point have probably cost me as much time removing what I don't need from them as starting from absolute scratch and only including things I need as I need them. Adding libraries in both Maven-based Android (I'm a stupid Vim Android developer) and Xcode iOS apps really isn't difficult. But that's only my personal opinion.

That said, this seems to populate the extensive layout and values resource directories, which is always the most tedious part of assembling a basic working Android app, where as Android Bootstrap doesn't have as many options and only populates the basic resources.