Last year, I was called back twice, but I'd also
qualified over 100 dates, so I had about a one in fifty
success rate. That's actually BETTER than most. When I
auditioned for the show (also passed, but wasn't chosen
since my wife wasn't on the same episodes/didn't wear a
feather boa/etc), I asked them what it was, and they
blathered about how it was an outside firm, and they really
didn't know, but they suspected it was around 3%.
So 3%. Given that these calls are made almost always
before 1:30, they could certainly add more, too. They
could also bring back time into the equation, and make
it to where the round two questions weren't such
giveaways, but....