Price Discrimination or Steering Customers to What They Want?

This article from the WSJ describes how Orbitz "is experimenting with showing different hotel offers to Mac and PC visitors". This experiment be viewed as an attempt to discriminate in price or as an attempt to help customers find what they want more easily. The experiment also illustrates how web sites and offers can be customized. 

Before reading the article, take a quick quiz:  Who saw more expensive hotels earlier in the list from Orbitz, PC or Mac users?