What's curious to me is that you are expected to say "fine", "great" or some other positive answer. Earlier on in my career, when I was still getting stressed out over work and the long hours, whenver anyone asked me this question (we don't use it much as a greeting around here), I'd always...
Never mind 110%, what about those who say things like "1,000%" or some other extreme figure? I think one of the candidates on Apprentice 3 said something to that effect and I was thinking, sheesh, talk about hyperbole. If you bring sporting terms into this, there are plenty from English...
Slight OT comment: I've noticed that HTF actually has a very high standard of English. I was on another (to remain unnamed) board recently, since the HTF discussions on a particular TV show were limited, and I found that misspellings and incorrect grammar were far more prevalent on that board...
Ah, reminds me of an email circulating some time ago about "buzzword bingo", i.e. a list of all these nasty business-lingo terms, and you could play bingo with them at your next meeting. "Value-add". "Bring to the table". "Synergies". Ugh. I never did, but I remember my wife telling me...