So what's the "real" reason?

Neurology
In Taiwan people who drink tea--black or green, even a little bit--have much lower blood pressure than those who don't, according to a note in the International Herald Tribune. And they're also much more likely to smoke, drink alcohol, eat salt, and eat fewer vegetables. Does it ever feel like you're searching for a needle in a haystack with your experiments--and that the hay looks suspiciously like a pile of needles?