TMDSAS: Thoughts on the low acceptance rate of older (30+) students?

I'm solidly in this category. I'll be 35 if I apply next year (though realistically it won't be till the following year when I'm 36). Looking at the most recent statistics available on TMDSAS's website, last year 314 30+ students applied and only 44 matriculated (that's 14%). Compare that to 21-23 year olds where 3417 applied and 1105 matriculated (that's 32%). I'm assuming most will only have the ability to speculate, but is this that TX schools prefer more traditional students? Is it... TMDSAS: Thoughts on the low acceptance rate of older (30+) students?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums