Oh yes, you’re right. So, yeah, a sufficiently ingenious reader might have noticed the (apparent) throwaway comment about the names, noticed that the letters of “Voldemort” are contained in “Tom Marvolo Riddle”, and worked out the rest before the big reveal fifty pages later. I remain of the opinion that it’s no big surprise if no one did.
Oh yes, you’re right. So, yeah, a sufficiently ingenious reader might have noticed the (apparent) throwaway comment about the names, noticed that the letters of “Voldemort” are contained in “Tom Marvolo Riddle”, and worked out the rest before the big reveal fifty pages later. I remain of the opinion that it’s no big surprise if no one did.