As Meyers says, if you have BB skills and are fast but short, the only real position that is open is the PG, so you are bound to get a sizable group of players swelling the ranks there. There has been a bit of a tendency toward smaller PGs on the men's college and pro side due to some rule changes that limit the holding and mugging that can be done to smaller players and allow zone defenses, so small speedy guys have more of a chance now, whereas before very recent times you had to be super-talented and a warrior-mentality guy like Iverson to survive in the NBA. I'm guessing that the same trends may be seen more now for women too.
That said, being a taller PG who can get off a higher shot and has a higher level court perspective a la Magic Johnson still has a lot of advantages, but with extra height often comes a little less speed and ability to penetrate the lane, so it is a balance. Or you can go with a Kaili McLaren as your point person and get a very high altitude court view along with someone who is superb at hoisting PGs in the air during NC celebrations.