As the linked article says, it does vary with higher-end malls tending to be in better shape. This matches my personal experience. One local mall that counts a Penney's and a Sears among its primary anchors doesn't seem to be in great shape. But if I go into Boston, something like Copley Place seems to do just fine. The shopping malls across the border in NH also seem to be regularly packed but that's something of a special situation because of sales tax.
They are. See for example this article[0] from earlier this year and the HN comments[1] from about a month ago.
[0] http://www.nytimes.com/2015/01/04/business/the-economics-and...
[1] https://news.ycombinator.com/item?id=10597487