In addition, her face and hands were mummified. Not her torso, not her limbs, not her lower trunk. Flies would land within minutes, unless she were placed there in the dark early morning hours of one of the days it got near freezing, but then it warmed up considerably every day, hitting quite warm temperatures by mid afternoon. EVERY DAY. It wasn't like Dubuque or Dallas or Detroit in February. It's San Diego. Warm, breezy, coastal, Southern California climate.
The eyes, nose, mouth, ears, genital area, any wound area (rape or other mortal wound responsible for her death) would attract flies post haste. As soon as the temperatures started to thaw a bit (like 8-9 a.m. for the golfers to be able to get on the no-longer-frost-covered grass), the flies would be swarming like mad. They had plenty of water from the golf course's regular irrigation, lots of food from the country club garbage cans and the housing area nearby to keep them fat and sassy, and spring-to-summer like warmth (compared to the rest of the country) to provide them plenty of energy.
On the other hand, beetles love the dry, tough, mummified meat. So they would have been present and laid eggs and begun hatching their beetlings from the get-go if the body had mummified within 24 hours. But they hadn't. (Unless that Bionic Ant carried them off, too.)
IMHO, this theory of 24-hour-mummification slowing down bug activity for at least 2 weeks just doesn't match the evidence.