That was my thought too. If it was someone Daryl cared about, you'd think you'd want Norman to get emotional. I don't think Daryl would have to hold his emotions back in front of the group. I don't think he'd feel the need to pull the tough guys don't cry act. I think he'd be comfortable enough with the group enough to break down over losing someone they all cared about.
And it I can't imagine he'd cry like that over a new cast member leaving so soon. I imagine that would be his reaction when Daryl finally dies though. I mean, its essentially like getting fired. I think he really enjoys being on the show and even though he'd probably be able to easily get another gig quickly, he'd still probably miss his dream job.
So now I have no idea what to think. It could all be a publicity stunt. David Morrissey said he'd continue to play the Governor a couple more season right up until they killed the Governor, so they aren't above lying to prevent spoilers.