Ever since it was announced that Panda is now "core," there's been a huge amount of misinformation and confusion about what that means. Google's Andrey Lipattsev recently spent some time clarifying the situation.
"It is less about the functionality, which means it probably doesn't change that much over time, and is more about how we perceive it, in the context of the algorithm. Do we still think this is an experimental thing...or is it like PageRank, it is part of it, it will always be there, at least in the foreseeable future..."
So it sounds like being "core" is more of an internal distinction that Google makes. Panda is here to stay, Google trusts it, and it doesn't need to be watched as closely as before. Sounds like they just feel like the biggest kinks have finally been worked out.
I guess you could use the metaphor of a sports player - some movements, over time, become purely instinctual.
But again, it seems like none of that has anything to do with being real time. So get that one out of your head!