My take on what it means is that she was coherent enough to call and text someone she knew. That means she wasn't drunk enough to not be able to consent.
I'm not much of a texter but it seems you would have to have quite a bit of control to be able to type out words on those little cell phones. At what point somebody is too drunk to consent is anybody's guess, it depends on a lot of factors. But one thing that bothers me is that she can't claim she was drunk when she lied to the county attorney and fabricated evidence.