What Version of Bash comes with OSX 10.9 / Mavericks? Trying to decide if I want to bother upgrading my bash shell to v4.x; if it comes with Mavericks, I probably won't, but I can't find much information on what versions of bash come with what versions of OS X, let alone with Mavericks specifically.

Anyone running a Mavericks beta want to bash --version for me?
Zephyr:~ ats$ bash --version
GNU bash, version 3.2.51(1)-release (x86_64-apple-darwin13)
Copyright (C) 2007 Free Software Foundation, Inc.
Zephyr:~ ats$ which bash
/bin/bash