From the "source" you just provided:
"Abt had a chance to talk to David Walsh, one of the book's authors, and Walsh admitted "there is no smoking gun in the extract or in the full book to prove that Armstrong, a 32-year-old Texan, engaged in doping."

Amazing… If a person passes his or her FAA check ride and later you end up flying with that person would you refuse the trip because your captain's/copilot's "Ex-Friend” says that way back when he/she did some drinking while in college?

Seriously, let the professionals deal with determining his “guilt” - so far he's been proven innocent and last time I checked you're presumed innocent until proven guilty, correct?

His charity has done wonderful things for cancer victims - why that hate? Are you Sheryl Crow?

(Kidding, they're still good friends)