Trivia: This film is actually the second version of "Exorcist: The Beginning" to be filmed and completed. But upon seeing the first version, the studio protested the film was based too much on the characters and wasn't the gore-fest they wanted, so they hired a new director and reshot the entire movie with a different script. The original version of the movie was recently released on video as "Dominion: Prequel to the Exorcist."
Trivia: Stellan Skarsgard, at age 53 when filming this movie, is nearly a decade older than Max von Sydow was at the time of filming the original movie (age 44), but is playing a younger version of the character.
Chosen answer: Yes. It may have taken so long because the blood was probably pooling at the back of her head, which caused her to pass out, then finally built up enough pressure to gush out of the cut or fracture at the back of her head.
Macalou