Indeed, in a recent survey carried out by industry analysis provider Parks Associates, two thirds of consumers who were considering switching mobile providers rated managed access to WiFi as part of the mobile service as "very important" to their decision. Within the survey that ranked WiFi a more appealing prospect than a loyalty rewards program or the chance of an early handset upgrade, and equally attractive as the ability to retain unused data.

From the article "The Return of Offload: Sticking Plaster or Preventative Medicine?" by Dave Fraser.