I guess I'm in the minority, because I never minded at all talking about my pregnancies, and loved hearing other people's experiences. Even the scary ones - because it was a reminder that most of the time, no matter how bad it got, I was more likely than not to make it through it and live to tell the tale. But, I also appreciated the people who didn't ask or mention it, because yes, I also welcomed the opportunities to discuss other issues.
The only comments that bothered me were the few (thankfully) that were flat-out insulting. Like the coworker who said, "Wow! Are you sure you're not having triplets?"
Another one asked me, "What does your doctor have to say?" Well, quite frankly, that was between me and the doctor.
So, I guess my point is that there's no universal right/wrong. Everyone is different.