Considering that 0.6 is not out yet, I wouldn’t be surprised if 1.0 slipped to 2018.
On the other hand, 0.6 is only a month behind schedule, and many of the major features we wanted in 1.0 are already in 0.6. In my opinion, the schedule for 1.0 has not really slipped – we’re still on track for this summer. I also think this is a fine time to start convincing people to look at Julia, while making sure they know a few more big changes are coming before 1.0, so if they really don’t want to have to update their code, they should wait until it’s actually released. But if they want to get ahead of the curve a bit, now’s the time.