It's not that surprising though, the discourse that women are the ones to blame is far reaching, far too many people believe that sexually predatory behaviour is natural to a man, and women bring it out of them, and so excuses and sympathy continue to be given to men for following their 'natural' instincts.
As long as that belief continues to do it rounds regarding men, the rapist pity will continue.

Alright, I was (sorta) wrong.
The first page of results for "student rape sympathy" (and other similar searches) contained articles, blog posts, etc all related to the Steubenville case and this case and the media's reaction to it has gained worldwide attention, so I doubt it's typical for university students who rape to get sympathy.
You're right about athletes and celebrities though, but that has more to do with our culture's worship of the rich and famous (and their nutty fans who support them irrespective of whatever nasty shit they do) than a culture that routinely blames women for being raped. There's generally more sympathy for celebrities who commit crimes than there is for non-famous criminals, regardless of the crime in question. The OJ Simpson fiasco springs to mind. He had (and still has) plenty of supporters.
It's also a lot easier for people to accuse the victim of lying and having ulterior motives (e.g; five minutes of fame, money, etc) when a celebrity is involved.