A lot of us have come from there, including PG himself. Welcome, and please read the guidelines: http://ycombinator.com/newsguidelines.html
We try hard to keep the discourse intelligent and civil.
I don't know so much that anybody should be calling themselves a reddit "expatriate". HN might service a slightly similar crowd, but reddit and hackernews are, to me, completely different types of websites.
That said, I love this website; please leave any sort of memes, pun threads, sensationalized headlines, politics, or circlejerking self threads like this one at the door.
Yes. My tolerance is clearly not as high as yours. I made the jump several months ago. It's much nicer here. Let's hope it stays that way.
I actually just discovered this site, but I highly dislike reddit for a number of reasons that I've been meaning to enumerate on my blog. So yes, I suppose I do count. :)
The signal-to-noise ratio on reddit just crossed my tolerance threshold. HN is now my first stop.
So you stop by and post a "noise" thread here on HN. ;) No offense but I find that slightly humorous. Oh well, we aren't obligated to upvote it.