I was reading the actual page:
http://whygitisbetterthanx.com
I noticed a typo, came here to fix and it was already fixed in the following commit:
d933f6f » schacon 2009-01-17 little fix submitted by robins
So 1/17/2009 is when the fix came in, the page being served to me has the following header:
Last-Modified:Fri, 09 Jan 2009 19:15:07 GMT
The website seems to be out of date and it should be updated.
Cheers