Their response is here. They basically seem to oppose the ad solely because Focus on the Family is behind it.
Focus on the Family has an unmistakable anti-choice, anti-birth-control, anti-sex-education, and anti-gay agenda. Its views on women are insulting and dangerous.....
Instead of watching Focus on the Family's ad, for 30 seconds, just focus on… something else. Use Facebook and Twitter to tell everyone why you object to the ad and tell them what you'll focus on instead of watching it.
NARAL President Nancy Keenan also did a Huffington Post column and NARAL shot a video of her answering some questions from a NARAL staffer.