In addition, 28% have "both a BlackBerry-type device and a smartphone with an HTML browser, such as a Droid or an iPhone," showing how vital they consider the souped-up devices.
Furthermore, 12% said they use a smartphone more than a computer for business. But 45% said they expect a smartphone or Web-linked tablet will be their primary device for business within three years.
The Forbes Insights data was gleaned in connection with Google and comes from a survey of 300+ executives at U.S. companies with $500 million+ in revenues.
The study found that about two-thirds of executives "indicated they're comfortable making a business purchase on their mobile device."
As for mobile advertising, there is some evidence it is having an impact. Over 50% of those surveyed said they "notice" it and "click on mobile Web ads and mobile paid searches."
Forbes said that along with the survey, one-on-one interviews were done with nine top executives at the large companies "to gain deeper, firsthand insights into how they're tackling business information."