A wordsmith I am not. I've added the text The small graphs show the raw numbers that went into the percentages to the Keep in mind section of each main graph. More could be said, but I'm not sure what.

I took a look and almost everything looks good to me. The descriptions are complicated (because the subject matter is complicated in places), but generally clear.

I'm always a little confused by the definition of abandonment and zero-results in the context of sessions, but I read them to be no clicks in the whole session (abandonment) and no results in the whole session (zero-results), rather than one query with no clicks or no results in a larger session. This is supported by Erik's comments here: T358350#9768803, and here: T370290#10016079. (Much of the time there isn't any difference here because many "sessions" are only one query. But for longer sessions the definitions give very different results.)

I think it's probably clear, but I spend most of my time thinking about the per-query versions of these ideas, not the per-session version, so I start reading with a heavy bias in the wrong direction. If anyone else has also been confused, we can tweak the text. Otherwise, we're good to go.

Seems reasonable to consider this done?