Things wrong with this article are:
1). It says 22 winds.
If using 1 wire to wind up the armature rapping each coil 22 times then it is a single wind 22 turn.
2). It says the less winds (actually turns) the higher it will rev but will have less torque. Not True. If you rewind a motor with less turns it has the same exact effect as over volting a motor. More Power.
Rewinding a motor for more power is better than over volting because you can use a larger gauge wire to carry the current. And the less turn you make the motor the more room you have to use heavier wire.
If you take a 500watt motor that has 20 turns you can rewind it with 10 turns and it will be 1000watts Rewind it to 5turns and it will be 1500watts and rev to 7500rpms. with out even over volting it.
You can modify a stock 1000watt motor to put out 2500+watts and rev to 9000rpms.
Speed, Distance, Torque... Pick any 2