14:54, chill. Testers pick up on when kid says "oh, my mom played this with me," etc. five or six times over the course of the test. Some parents buy the WPPSI materials then run their kids through the various possible tests, etc. Remember, they are trying to measure aptitude, not just current ability. Simply because a 5 y.o. can read does not necessarily mean that she or he is gifted, etc.
Crap. I do not know what you mean by gifted. That's your term. But if your 5 or 6-year old is taught to read, write and his multiplication tables, he or she will usually ace any entry level test. Take your pick. It has nothing to do with giftedness but everything to do with parents spending a little time (45 min a day) for many years (quality and consistent) teaching and mentoring their children. This is not cheating. This is not unethical or immoral. On the contrary, we need more of this. And if kids ace silly admission entrance tests with this "prepping"... so be it.