I am no math teacher either, but HAVE certainly gelded my fair share of colts, and never had any of them become HUGE just because they were gelded. What I was trying to get across was you aren't going to get a mini growing 3 inches taller because it was gelded.
Besides, even if it did grow a smidgen more, it is by far outweighed by the fact the neck and throatlatch stay more "feminine" which I much prefer on my geldings than the thicker throatlatch and neck of many of the later gelded horses. I would rather it be nice, "natural" and easily kept than have to fight with sweating etc... Don't have to put up with stallion attitude either...I like to geld them ASAP.
The mini world needs more geldings, and a lot less stallions, and "scaring" people with "OMG...it will grow huge if you geld it early" is not what we need.