Depends.
If I call, she calls back
If I email, she usually emails back...but if I tell her I think I need to talk on the phone she'll call instead.
I've never texted my T, but I assume she'd reply in kind unless I was asking for a call back.

I've had two instances where I emailed her and was just really vague and confused in the email, so she called me instead of replying. I've had an instance where I left her a voice mail and said she could just email a reply if she wanted, so she did.