Yes, I'm actually checking to see if it contains a plain gcc compiler (like Xcode 4.1 did), currently the llvm-gcc that is symlinked with /usr/bin/gcc with Xcode 4.2 doesn't work too well with software from rvm and homebrew.

edit: I just pulled down the Unix developer tools, it comes with llvm-gcc and clang. /usr/bin/gcc is symlinked with llvm-gcc. Any packages that need plain gcc will not work with the "command-line-tools-for-xcode.dmg" install. We'll have to keep using something like OSX-GCC-Installer (https://github.com/kennethreitz/osx-gcc-installer) for now.

Anyway, this is a positive move for those of us who want to be able to use Xcode and also need/want a normal gcc installation on the same machine.