Don't believe so? Only mention I can find him making of Haswell overclocking is this post on twitter. I guess you can take the statement of "Haswell = Overclocking" with a link to a Tom's Hardware article discussing the just-revealed details on Haswell overclocking features to imply that it's an awesome overclocker if you want to... I tend to just take it as a statement that Haswell includes more overclocking features.
Francois didn't make the "overclocker's dream" comment, that was supposedly and intel engineer on reddit.
He did, however, claim the toms hardware preview of Haswell wasn't intel sanctioned and that the numbers were inaccurate (everyone was upset about how it didn't show much improvement over ivy). Tom's later review pretty much showed exactly the same results.