I know people who've tested at just before 4 for school entry reasons. If you believe your child needs early entry you must have scores go back it up (where I live) and depending on your child's birthdate the time line for all that paperwork can mean the testing has to be done by 4yrs, give or take a few months. My HG+ DD we first tested at 4y9m and that was at least 6 months too late to get her early entry, by then we were fighting for her to go to yr 1 after 6 months of k instead of 18 months (our state has a weird school entry system).
