Not just zero pages. It should have a page limit so that the defrag is across an index that's greater than 1 extent or the defrag just won't work. I haven't touched this since it was published 5 years ago. I may have to update it at some point.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning