The scores are quite high... but you need to realize that children learn at vastly different rates at the very young age ( you know the kids that talk early while other don't talk until they are 3)... this is why in some places they don't do the testing for gifted kids until they are closer 6 or 7 years old. I'm not trying to say your child isn't gifted by test like IQ test are calculated in part based on the age of the child. So a child that is learning quickly in the first few years will tend to have a higher IQ then one that does't... it doesn't however mean that they will continue at the same rate. It isn't uncommon for some kids to slow some such that if you test their IQ 2 years later it is somewhat lower than before. I only say that because at 4 years old you run the risk of putting a lot of pressure on a child that might turn out to be normal later and not gifted. You'll find a lot of kids that seem gifted compared to other kids simply because they come from families that have parents that actually interacted with them while they were babies instead of using the TV as a baby sitting service.
So just be careful using numbers from such an early age.