I've had general surprise from people, after they've learnt I'm Jewish, and that's fine.
However there have been a handful of occasions where that surprise has led to the other individual/s making stereotypical comments.
I remember a conversation with a former colleague (three years ago now), where after learning of my (and my DH's*) Jewishness he said, "ah that explains a lot then." When I asked him what I meant, he tried to brush it off by saying, "you know what, never mind, just forget I said it." However I asked again, and that time he said he had wondered how DH and I were able to live in the home we did, "and lead what appears to be, a very comfortable life," when we were only in our mid-to-late-20s. He concluding by saying, "but now I know, because we all know that Jews are good with money." 
- He had asked, "and your husband too?"
I reported it of course, but the entire conversation had taken place at, where else, the office's 'Christmas party'. He told HR he had been a 'bit tipsy', and was 'horrified' to learn of his comments, and that he would never have said such things if he hadn't have been 'tipsy'. He was asked to apologise but that was it.