Jack doesn't look very surprised, but that's mostly because his sanity meter is still set to 'no' about this whole situation in general. He's going to suspend both belief and disbelief until he's got more facts to deal with.

"Four," he echoes, eyebrows just barely raised. "Wow. I'll admit, I'm having trouble imagining that. But apparently we all got yanked from different universes, so I suppose it's not that much of a stretch. What do they all look like?"

Jack can make some educated guesses based on the groupings, but he's not exactly a big fan of fantasy.