Wenger, who is out in South Africa working for French TV, believes the fear of losing the first match has so far restrained some nations from playing to their usual style.
"In the first round teams play more not to lose than to win," he told Arsenal.com. "The games are quite locked tactically with very few chances and very few have had a go.
"The pressure of the World Cup is so intense nobody wants to lose that first game. It harms the style a little bit.
"But it is a tournament that lasts one month. A slow start and being qualified is better than start at 100 miles per hour."