question about the meta-generator exception

looking at the results from the Opera mama survey of web pages

the Total analyzed URLs was  3,509,180 [1]

the total number of pages containing a meta element with name=generator was
942,051

so that appears to equate to missing alt will not be flagged as an error on
37% of web pages.
Is this correct or have i missed something?

[1] http://dev.opera.com/articles/view/mama-the-url-set/
[2] http://dev.opera.com/articles/view/mama-head-structure/#meta

-- 
with regards

Steve Faulkner
Technical Director - TPG

www.paciellogroup.com | www.HTML5accessibility.com |
www.twitter.com/stevefaulkner
HTML5: Techniques for providing useful text alternatives -
dev.w3.org/html5/alt-techniques/
Web Accessibility Toolbar - www.paciellogroup.com/resources/wat-ie-about.html