Now I understand why some business are so concerned with preventing other websites and people from using their name. I'm not saying that Twitter should have demanded that these guys change the name of their framework to something else, but this is a good object lesson of how using someone other company's name can cause confusion.
In retrospect probably one of the biggest things that motivated me to investigate Bootstrap was because it had Twitter in the name, and I had the mindset "If Twitter uses it, then it must be good."
So I'm surprised to find out that it wasn't actually that deeply tied to Twitter.
Edit: I went back to the website for Bootstrap and the website clearly says:
Built at Twitter by @mdo and @fat,
versus here @fat is saying:
it isn’t actually maintained by a team at Twitter (nor was it ever).
So now I'm actually more confused.