I almost gagged the first time I had the tapioca - "what are these chunks coming up my straw??!" but now I love it!
I always thought iced tea (western style) came in two styles - pre-sweetened and flavoured, which I thought was American style, and just straight cold black tea and ice, with a little pitcher of syrup on the side to sweeten yourself, which I thought was British style. Not sure where I got that impression from though.
The asian "iced-tea revolution" may well have been influenced by Americans and other westerners, Maybe the American esp. military presence in Taiwan in the 60s and 70s introduced the concept, which then caught on locally and was marketed by people like Liu.
I do know that a lot of Taiwanese and Chinese still view drinking cold drinks with suspicion, saying its not good for one's health. Traditionally beverages were always hot, probably coming from the very practical need to boil water before drinking it for health reasons. If it wasn't hot, then it would be suspicious.
But in the last 10 or more years in Taiwan, and much more recently in China, cold bottled teas (green, oolong, black - and Nestea!) are sold in convenience stores - they're now very popular, but probably especially with the younger set. Plus everyone has a fridge nowadays.
I happened to live in Taichung in Taiwan, where I was introduced to Chun Shui Tang. Just lucked out I guess.
Steve