Your point is well made that not all tea is created equal, and it is the properties within the tea that we need to use as indicators of having potential good health benefits (ie, catechins, the well-known antioxidant), and not to tout a broad category of tea (green, black, oolong, etc) as "the best for health".
Do you mind telling us about your background and or credentials in relation to this topic?
What other characteristics of tea are healthy or not healthy? I'm asking, because I think we're on the same page...we can't make sweeping generalizations about a type of food or beverage that is "best", as they all differ in quality. Also, some substances may be contraindicated for some types of persons or conditions (ie, high-risk pregnancy, as I have, it is highly recommended to severely limit caffeine intake).
When is it good to drink 5-8 cups of high-antioxidant tea, and when is it not? This definitely does not sound like a "moderate" undertaking, as it is difficult for most people to drink 1-2 cups of water a day...I can't imagine many people actually being able to follow this recommendation on a daily basis...that's a lot of tea!
Any negative health effects that you've found in drinking tea, including is it bad on your teeth?