Detractors of Atlas Shrugged would never be pleased with any faithful adaptation of the novel, and so this movie’s primary audience is those who enjoyed the novel, are generally sympathetic to Ayn Rand’s ideas, or both. (If their response is positive, then the word-of-mouth buzz should attract the curiosity of many people who aren’t yet familiar with the novel.)
On this front, it looks like Aglialoro & Co. have scored a direct hit. The early reviews are quite positive.
Read the details on the Atlas Shrugged movie blog.