I was actually surprised when our allergist said she was testing for everything (except the foods he was tolerating). I thought she would just be testing for the "big ones". It was the allergist (not the ped.) who told me that there are a lot of false positives. She said that there are many adults walking around thinking they are allergic to 20 different things, but aren't. Made me want to get re-tested for the tree nut allergy I've claimed I've had all my life!
She did say that my DS could still develop certain allergies (animal, environmental) but for now he's good. She also said that since he has the dairy and egg allergy, any wheezing is a sign of asthma- even if it seems to be related to a cold. There is an 85% chance he'll grow out of his food allergies, but for now he's an Epi Pen kid! I hope you have better luck with your results!