
Also, good work Mr. goomba! I have only skimmed the article you linked, but I think I'll keep it for reference. My guru basically supported this research when the topic came up last month. He told me that, if you're really concerned about the caffeine, it's better to drink the first 2-3 steeps, dump 4 & 5, then drink 6-8. That's assuming, of course, the tea can go 8 rounds!
Taiwan teas (semi or tightly rolled, such as High Mt. or Dong ting mentioned a few posts ago) don't need to be 'opened up'. Try this routine:
1st steep 1 minute
2nd steep 40-50 seconds
3rd steep 1:10
4th steep 1:25
I rinsed all oolongs for years because 'everyone did it that way'. When I learned the above method a few years ago, it really changed my life!!! Another technique that you can try is to do the 1st & 2nd steeps back-to-back, pouring them together in a pitcher before serving. It mixes the aroma from the 1st with the fuller flavor of the 2nd, and makes a more balanced cup, although not suitable for all teas.
Cheap quality teas are poorly produced, so rinsing often makes them more palatable. It also means you probably get about 3 rounds (steeps) before you need to change leaf. With high-quality leaf, you can drink 5-7 rounds, so this actually makes it more cost effective.
The exception to the rule is with aged teas. If the tea has been stored for a number of years, you should probably rinse it once quickly, but it also depends on the storing conditions.