Yeah, but lots of people predicted facebook's success at that point in time. I think the person I responded to was very much in the minority in thinking facebook wouldn't be able to ring the cash register when the time came. I'm more pleased to have been right about Weebly.
They weren't necessarily the hottest company from our batch with investors at the time, and they weren't the odds-on favorite to be among the biggest YC exits. There have been, what, maybe a half dozen bigger exits in all of YC history, thus far, if that many? I haven't really kept up with YC companies that I don't know personally, and I'd guess that in five-to-ten years this may seem like a quaintly small exit by YC standards, but for now, that's a lot of money.
I liked them based on their execution and pragmatism, not on their credentials or merely being smart (everybody in YC was wicked smart...it's the first time I'd been in a room where I was pretty confident that most of the folks in it were smarter than me), and I think investors may have been occasionally looking first at the companies out of Stanford/MIT/CMU/etc. I doubt they had trouble raising money but I never recalled them being widespread favorites among the Valley's cognoscenti either.