My T is the opposite of rude, and never responded to my e-mail I wrote her earlier this week. This sometimes happens, and she generally tells me that she read it and wanted to think on it, and just wasn't able to write back before she saw me the next week.

The times she hasn't written back has been okay with me. I always know I could write again, or call if I really needed to talk to her, and she would contact me.

So, it isn't always rude.