Not 100% sure, some clarification is needed. In the chat with Chad, it was stated an average below 60 and 100 more ranked rounds. So if your average is currently below 60, its 100 rounds until the new tier, but not sure how to progress to it from an average above 60.
With that said it seems Legend averages are not in a continually downward spiral, and are fluctuating again.
WGT care to weigh in?
Cheers,
b0gey