The movie did come out to rather mixed reviews, although it's very doubtful Moore noticed or even gave a sh*t. (Watchmen artist Dave Gibbons was onhand at last year's Comic-Con to discuss the movie, however, which you read read more about here, courtesy of Elisabeth Rappe.
"I find film in its modern form to be quite bullying... It spoon-feeds us, which has the effect of watering down our collective cultural imagination. It is as if we are freshly hatched birds looking up with our mouths open waiting for Hollywood to feed us more regurgitated worms. The Watchmen film sounds like more regurgitated worms. I for one am sick of worms. Can't we get something else? Perhaps some takeout? Even Chinese worms would be a nice change."
He also didn't mince words about both the comic book industry and the movie industry.