Is Card Counting Legal

In a September 19, 2012 article, The Columbus Dispatch stated:

"Although the idea of beating the casino has been dramatized in movies such as 21, in which college professor Kevin Spacey organizes his math students in an elaborate cheating scheme, it’s usually not that sophisticated nor complex, Edwards said."

The movie was about card counting and in no way was a "cheating scheme". When questioned, the author of the article claimed that Wikipedia says card counting is illegal in some jurisdictions. In fact, the Wikipedia article on Card Counting states the opposite -- that card counting is not cheating.