'Corner of a table leg' fits in the general category of explanations that Sarelle was favouring. She nods and files the information away, along with the knowledge of how far away her hand was when Kiri reacted to reading her. She is pleased that it's not overhwelming; this way seems more convenient for, as Kiri suggests, communicating things. (She is also pleased that she is noticeably different from most people; it's a direct confirmation of a theory that she could not previously have confirmed.)