I miss the feature of sampling. In Just Accessible we created a separate sampling mechanism as it takes to much processing capacity to test millions of pages. But we first have to crawl them all because taking the first 400 pages didnt gave us a useful selection. There are several sampling parameters possible random, hierarchy, user statistics, content date, content type.
Reference
http://lists.w3.org/Archives/Public/public-wai-ert-tools/2014Aug/0004
Original Comment
I miss the feature of sampling. In Just Accessible we created a separate sampling mechanism as it takes to much processing capacity to test millions of pages. But we first have to crawl them all because taking the first 400 pages didnt gave us a useful selection. There are several sampling parameters possible random, hierarchy, user statistics, content date, content type.