I don't think the majority of boy parents get upset when a girl is in the bracket - especially at the younger ages. It does become a little more ackward for the boys as the girls mature and sometimes the boys are not sure about where to put their hands and have a little trouble trying to reconcile being brought up not be rough with girls and now they are to put one on her back and hold her there. My son has wrestled some very tough girls over the years - Krista Revelle, Gabby Speer, and although he never actually wrestled Morgan Otteson, she has appeared in his bracket before. All these girls have beat some very tough boys. I do think that if an older 10/12/14 year old boy is not used to wrestling girls, the good experienced girls can have the advantage.