I was reading the discussion:http://www.sqlservercentral.com/Forums/Topic1013494-2758-1.aspx
about this article: http://www.sqlservercentral.com/articles/BETWEEN/71395/
having to do with a faster BETWEEN for dates.
One of the issues that came up was problems when using fake/unrealistic sample data
I had already bookmarked many places that have sample data. Much of it is "real" -- meaning it is actually data people use, meaning you should be able to have more realistic examples, very large data sets, better optimize your queries/plans, etc. And once you get familiar with some of these data sets, it is probably faster than building some loop to generate faked data.
So here are some sources, do you know any more?