Part of this, I think, is that the various members of the MU communities seem somehow more prone to culture shock than the average person. Ironic, since every game is its own unique world with its own unique population and unique ways of doing things. You would think that we would be better at moving between things.
But even the smallest of changes, like the format of a command or the pacing of a scene, is enough to give some of us serious anxiety. Which is understandable. I'm one of those people, at times.
But I think it's something we'll all have to work through, just as we work through any new thing on any new game/system/whatever. Eventually you'll find your flow within it even if it's not what you're used to.
You think slowing the pace of scenes is bad, let's look back on yon olden days when the OOC Masquerade (or whatever you called it in your individual system) got booted. Some of ya'll still aren't over that, but the rest of us moved on.