All is well: Amazon UGG rankings are very pleasing. Among all shoes form men, women, and children, the UGG Classic Short is the top seller, and three other UGG styles rank in the top ten. (Because I know UGG Classic Tall is always the second most popular style, I include it in the top ten, even though for unknown reasons Amazon does not include it in their rankings. Last year they failed to include the Classic Short.)
Moreover, the Classic Short is first on the "most wished for" list and the "gift ideas" list (the latter meaning it ranks first in number of gift cards requested).
Other styles have been moving up the rankings as well.
At Zappos -- the top online shoe retailer -- UGGs totally dominate women's and kids' shoe sales.
The Google Trend line is very strong, too, and so is the Alexa web action measure.