Being in England and Ireland this summer, I got in the habit of drinking tea rather than coffee, because while the cheap coffee there is dreck, cheap tea is just fine.
Before long, I realized that in drinking tea, I did not get jittery and anxious the way I do when I have coffee. And tea did not bother my stomach at all. And I could even drink it late in the afternoon without it hindering my sleep.
I still like coffee, but mostly, even now that I am back, I keep drinking tea, because it seems to make me feel, well, better.
Today I read this. Granted, the research is funded by the Tea Council (do you think they are hiring?), but still.