I'm not sure I can agree.
> Are they using the formal definition of chaos, or just a colloquialism?
Is it a colloquialism to use a word in its normal English sense? Chaos as a word precedes Chaos Theory by some thousands of years. If I write a theory and take over an existing word in everyday use, it seems a bit much to accuse every one else of colloquiallism when they use an existing but less strict definition?