Cordovan,
I for one appreciate rough estimates, knowing and understanding what the word "estimate" means.
I understand we do not live in a perfect world and sometimes things hit the fan and estimates run over. Do I get bummed and perhaps impatient at times, sure; I'm human too. But, angry, threatening, raging, etc... no. There is just no need for that.
But, I do appreciate the rough estimates as they give me a sense of what to chose:
a) watch some YouTube videos for a little bit until it's done
b) play on the forums and try the game tomorrow
c) read War and Peace
d) jump on a spur of the moment weekend road trip