As a parting gift:

The Wise Guys Contest cumulative season record for 49 experienced sports handicappers, at least half of whom are well known in sports handicapping circles:

892 Wins 773 Losses Against the Spread (ATS)

Needless to say, the contest was public, with everyone's selections posted mid-week.

This 892-773 ATS record is 53.6%, well above the 52.4% needed to win versus the standard 11/10. However, this does not tell the entire story. These handicappers were all locked into a single Monday line, which was disadvantageous in that (A) nobody could shop for numbers and (B) underdog players were at a distinct disadvantage as favorite money is more common during the week. Had the players been allowed to either shop for numbers or wait until later in the week, the cumulative record would have improved by a minimum of 15-20 games. It may possibly have improved by much, much more.

In addition, most players have access to something better than 11/10. My standard wagers are made at -108. Various books offer -105 on particular days or for particular hours. So the 52.4% number often quoted as necessary to win is actually way too high. Some books also offer rebates on losses every six months.

To the extent that experienced sports handicappers are "APs," one can put to bed the idea that "APing" is some kind of myth.