Sony Computer Entertainment Europe has issued a statement in response to the leaked memo that revealed release dates for a number of upcoming PlayStation Network releases, including Home.
To quote: Internal working documents naturally have proposed dates against titles, but these change frequently and dates are not confirmed until issued as part of a press release or formal announcement.
The same applies to titles of games, which may be working titles or placeholders subject to later confirmation. As a result, no weight should be given to titles or dates that appear in this document, other than to those which have already been formally confirmed.
In summary, the list is indeed real, but the dates on it are subject to change. :P