[georgebashi]

I've tweaked mine to this, which includes untracked files, but honours your gitignores:

  let g:ctrlp_user_command = ['.git/', 'cd %s && git ls-files --exclude-standard -co']

It was annoying me that I couldn't open files I'd just created with CtrlP, as they wern't yet tracked.

[robbles]

Just tried this out on my setup, and it made a huge difference. A large project that used to take ~1s to load the first time is now pretty much instantaneous.