I think people don't respond to texts for a few reasons:
-can't respond at that moment
-forget to respond....they read it & it no longer pops up as new
-don't want to respond
I think if it's acceptable for us to text then it's acceptable for me to answer in any way I want to: no response, one word response etc.
Do I like some answers? No but then again maybe some people don't like that I text.
What I like about text? If I don't want to answer, I don't have to deal with it. (However, I almost always answer...hahaha).
In person, you don't have that option.
It's just a sign of the times. New age, new era.
It's like back in the day, when we had answering machines (heh heh) and we wouldn't pick up if we wanted to see who was calling first then didn't want to talk to that person.
Then came caller ID. Woo hoo. See who's calling. Decide if we want to talk to them.
It's all just a matter of the times we live in.
I say if it's important call.
No reall biggie. I wouldn't let yourself get upset. Going forward, if it's really important & you want a response, put in the call leaving a message if you have to. Then follow up with a text later.