Coffee trends 1
A couple of months ago, Time dedicated some lines to what the article writer thinks is a younger generation trend: preference of energy drinks over coffee.
She even mentions a research that seems to point to the fact (?) that under-25ers are becoming "coffee-resistant" and it seems that this is mainly due to the coffee bitterness.
The study was conducted by a reputable research firm and we must assume that the population samples and sizes were scientifically determined.
Source: http://www.roaste.com/CoffeeBlogs/Gazy/Coffee-trends-1