*Chuckle*
I am one of those who may not respond immediately to a post. I have a life, sort of. I usually Freep while studying. That means that I respond when ever I look-up from a book to click "Refresh" and see if I have any FReepmail or comments. Also, I eat, sleep, run errands, attend class, and work. It could be minutes or hours before I reply.
How far along are you in your Ph.D.? After I get my master's, I'll be going for one, too. It's a long, hard road!