According to that source of wit & wisdom, The Sun-Herald, 2009 marks the 30th anniversary of coffee overtaking tea as a substance of addiction in this country. It’s been all downhill since then. We now consume, on average, 4 litres per person per year; I think I consume at least 4 litres a week myself.
However, debate continues over the difference between a flat-white and a latte. I always thought there was more water in the former and milk in the latter. Certainly there does seem to be a differing viscosity. dave points out that some folk speak of the ratio of the cap foam vs normal milk; for others, it’s simply a matter of cup vs glass. Then of course, there’s my current favourite, the piccolo which for me, is a latte but with less than half the milk. Due to the reduced milk, there’s a stronger taste of coffee.
http://www.lokeshdhakar.com/2007/08/20/an-illustrated-coffee-guide/ this is a nice easy reference, although I have seen a bigger version with more coffees and variants