Should we not also see rep when you hover over the OP's username / profile link?
I know the reputation is right below it, but not everyone will expect to look in in a different place.
It would look ridiculous to have hover text of
"Not all people are smart like that"? You can't help them no matter what you do.
Hovering over the avatar image for 1k+ users shows the user card, which displays the reputation score. If you really want the reputation in a hover format, there you go.