Yes, he's a human with issues and priorities that can take precedence. I think most of the adults here can appreciate that. Plus as someone stated, he's toiled in obscurity for some time and now is enjoying the limelight. We have gotten other content from him, however, we are all chomping at the bit to get at least some information about Peace Talks.
I don't think it's unreasonable to crave an update, and get a little salty when it's been over a year to see one on the site itself. I, personally, don't have the time to wade through his AMA's and follow up on his interviews, so a nice short blurb in News would be fantastic.
If people want to bitch about it and feel they're owed timely releases and decide they aren't going to support the series going forward, that's their prerogative. I think that's just acting childish.
Would I like the book to come out ASAP? Hell yes. Do I think it's unreasonable to be concerned if he'll be able to finish the series a la Jordan, King(yes, I know he finished the Dark Tower, but it took about 12 years in between books at one point, right?), GRRM, or Rothfuss.
Authors don't owe us anything. We're their fans, and yes, we support their works, and yes, if they want to keep us as fans they should get us updates and releases, but they don't owe us.
Remember, rush a miracle worker, and you get rotten miracles.