Nope, it's real. Maybe it's just overreaction, but after seeing a few submitted stories get upvoted and then fall far off the front-page in minutes, I got the feeling that the old account might be blacklisted in some way. I was going to kick the tires on this one and see if it worked better.
Jeremy's already got http://news.ycombinator.com/user?id=jashkenas
Is this a fake?