In the warp-speed that defines the Internet age, digital magazines are downright pre-historic. When they first emerged in the late 1990s they were considered the greatest thing since sliced bread. But they didn’t get as much traction as the magazine industry might have liked. But with beefier broadband and more business travelers on the move, that might be changing. A survey released this week by digital-magazine company Texterity and BPA Worldwide showed that 89% of digital readers are “very satisfied” or “satisfied” with their digital publication. It also showed that digital magazines are pretty successful in pushing product — which is key for brand marketers.