No question involved here. Just a comment.
Autodesk advertises reduced file size with the 2005 release. Today was the first time I really paid attention to same - and was really surprised. A client requested a drawing file so I complied by e-mailing it to her in 2005 format. Shortly thereafter she requested the file in 2002 since she could not open the first. The second e-mail took much longer to go out so I decided to take a look at the file size. 2005 was 387 KB while the 2002 versopm was 2,261 KB, for the exact same drawing. That is a huge difference. No wonder 2005 is faster.