It's more common than one might initially think. But the reasons for that aren't something that Xemnas is likely to mention, even if he had been aware of Bertie's thoughts on the matter. Instead, he turns to the other comments at hand, and although he doesn't take the offered hand, that's more for the fact that he's long since fallen out of the habit of physical contact than any sort of imagined slight.

Instead, he offers a polite sort of nod in return, before he gets about to the question.

"That is correct. I presume that you are less-recently arrived?"