Its not about developing the neurons or axons. here is an excerpt from this site http://www.ncbi.nlm.nih.gov/books/NBK27954/
"Conduction velocity in myelinated fibers is proportional to the diameter, while in unmyelinated fibers it is proportional to the square root of the diameter. Thus, differences in energy and space requirements between the two types of fiber are exaggerated at higher conduction velocities. If nerves were not myelinated and equivalent conduction velocities were maintained, the human spinal cord would need to be as large as a good-sized tree trunk. Myelin, then, facilitates conduction while conserving space and energy ."
It isn't just in motor control.
"In the CNS, the structures of myelin are formed by the oligodendroglial cell . This has many similarities but also points of difference with respect to myelination in the PNS. CNS nerve fibers are not separated by connective tissue, nor are they surrounded by cell cytoplasm, and specific glial nuclei are not obviously associated with particular myelinated fibers. CNS myelin is a spiral structure similar to PNS myelin; it has an inner mesaxon and an outer mesaxon that ends in a loop, or tongue, of glial cytoplasm (Fig. 4-3). Unlike the peripheral nerve, where the sheath is surrounded by Schwann cell cytoplasm, the cytoplasmic tongue in the CNS is restricted to a small portion of the sheath. This glial tongue is continuous with the plasma membrane of the oligodendroglial cell through slender processes. One glial cell can myelinate 40 or more separate axons ."
The myelin doesn't just thicken in wraps layers
"Before myelination, the axon lies in an invagination of the Schwann cell (Fig. 4-10A). The plasmalemma of the cell then surrounds the axon and joins to form a double-membrane structure that communicates with the cell surface. This structure, called the mesaxon, elongates around the axon in a spiral fashion (Fig. 4-10). Thus, formation of myelin topologically resembles rolling up a sleeping bag; the mesaxon winds about the axon, and the cytoplasmic surfaces condense into a compact myelin sheath and form the major dense line. The two external surfaces form the myelin intraperiod line."
Here is a little slide show by the guy who wrote the talent code.http://thetalentcode.com/myelin/
Honestly myelin help neuron and axon circuits fire faster and more precisely. How could this not have anything to do with psychic talent?