Hi there. It's me again!

Ashes is growing up to be a gorgeous little boy and his silver coloring is really coming in! He'll be FOUR MONTHS soon, can you believe it? He's about 6 lbs now too!
I have a couple questions. All the local vets in my area will neuter between 4-6 months of age. I've read other posts and peoples' concerns and opinions but one thing that seems to vary widely is that some people say neutering early makes the dog grow larger and others say the opposite and that hormones are needed to increase dog growth.
Does anyone actually *know*? Would love to hear from a breeder or vet on this. Thanks!