I agree, and we have posted a similar warning in the XP forum which is now a Sticky Note.
Can you find a different link? it doesn't have to be Microsoft, but if it could 'spell it out' in easier to read terms, that would be helpful. I found the information in the link you gave to be a bit vague, and their own link at the bottom seems completely strange, eg;
End of Support Windows XP SP2 and Windows Vista without Service Packs
That just takes me to a "Upgrade to Windows 7" page. Not helpful at all,
I did find this; http://support.microsoft.com/lifecycle/?p1=11712 but it is not clearly stated.
If you find anything else more clearly presented, make a new thread and let me know, (report yourself as offensive!), and I will see about making it a Sticky post.
Support for Windows Vista without any service packs ended on April 13, 2010. To continue support, make sure you've installed Windows Vista SP2