I guess you could interpret the semantics of the article prose either way - at best it's ambiguous.
Snapshots are one of the features I liked the most when I helped write the code for them for SQL 2005, and also one of the most fun to teach as they're really non-intuitive in the way they behave.
Thanks
Paul Randal
CEO, SQLskills.com: Check out SQLskills online training!
Blog:www.SQLskills.com/blogs/paul Twitter: @PaulRandal
SQL MVP, Microsoft RD, Contributing Editor of TechNet Magazine
Author of DBCC CHECKDB/repair (and other Storage Engine) code of SQL Server 2005