[He was hoping for something more emphatic, like "Wow, you're an amazing telepath!" or "Rats, my deepest, darkest secrets!". Even something like "None of your business, weirdo!" would've been a little gratifying.]

Yes, there's been another case that I know of. The theory is that the longer the absence, the likelier it is you forget everything. But I've seen others return that can recall their previous time. It's all very odd.