Anna's comments were from experience.
The major agencies need tall models because the major clients want them.
Local agencies often have to make do with shorter models because there are only so many tall ones to go around.
Thus, local fashion shows put on by retailers will often have shorter models. Those shows, however, are not the same as the ones put on by manufacturers and designers. In those shows, staffed by major agency models, the sizes and talent are quite different.
Thanks AMTAgency! And I thought I'd add this link:
It's the Featured Model in Plus Model Mag for this month. She's 5'3 and weights 190lbs, but she's done some great fashion work because she's dedicated.
I'm not saying that everyone will be able to do what she's done, but it's certainly worth trying.