At least 1,500 people visited Sprinkles on Jan.13, the cupcake chain’s opening day in La Jolla. Cupcake worshippers started lining up at 5 a.m. at the shop, said spokeswoman Kelsey Tyree, and a line wrapped around the shop, located at 8855 Villa La Jolla Dr., all day. Most waited more than two hours to order a cupcake. April Doctolero waited anxiously for both a cupcake and a photo with Candace Nelson, Sprinkles founder and judge on the Food Network series, “Cupcake Wars.” Doctolero said she travels for a living and tastes at least one cupcake in every city she visits. Of the more than a dozen cupcake shops she’s been to, she said Sprinkles is her favorite. “A cupcake is a cupcake,” she said. “But Sprinkles is a product that is separate from the rest.”