Anecdotally I've found I'm more alert [in the mornings particularly] without caffeine but cutting it out hasn't helped me normalise my sleeping patterns.
If you want to normalise sleep patterns, I strongly recommend text "Good sleep, good learning, good life" (http://www.supermemo.com/articles/sleep.htm) It is quite long but IMO very well worth it.
Seriously, my point was, whilst everyone ran around hyperventilating at the thought of saving money on coffee (oh my god oh my god oh my god cheaper coffee) they (possibly - I didn't perform any research) overlooked the quite probable (I'm actually not a mathematician) fact that they're already drinking too much, and such a scheme will cause them to drink even more (up 20% you say?).
I love sarcasm. I hope I didn't offend anyone. I'm in a weird mood today.
Anecdotally I've found I'm more alert [in the mornings particularly] without caffeine but cutting it out hasn't helped me normalise my sleeping patterns.