The ShippingPass pilot program launched last year and offers free shipping on all orders.
Barnes & Noble came in second, followed by Williams-Sonoma.
Office Depot’s mobile site produced the fastest iPhone access time across all service providers among large web retailers in February, says Compuware Gomez. Last month, OfficeDepot.com’s mobile site loaded on an iPhone in an average of 4.64 seconds.
BarnesandNoble.com came in second for iPhone testing with 5.47 seconds, followed by Williams-Sonoma.com (5.55 seconds), Blockbuster.com (6.09) and Sears.com (6.40).
Gomez measures the average iPhone response time for the three major service carriers: AT&T, Sprint and Verizon. Testing for all 20 retailers takes place once per hour per carrier from two U.S. locations (Virginia and California).
Gomez measures response time as the end-to-end time elapsed while downloading each mobile site.
Click here for the full test results.