In an effort to help the mobile users, Google studied the effect of incorporating a feature like Google Suggest on mobile phones with 9-key keypads.

Here are the results of the study “Query Suggestions for Mobile Search: Understanding Usage Patterns.”:

“We found that these users respond favorably to query suggestions: Users who were shown suggestions while typing their query rated their overall enjoyment higher and perceived workload lower than users who were not shown suggestions. Users who were shown suggestions also reduced their overall key presses by half. Surprisingly, the time to enter a query for these users was not significantly less than the average time needed to enter queries for users who were not shown any suggestions.”

Very interesting study. Especially when it comes to buying a .mobi domain, a lot of people forget to think about the issues that come with a mobile keyboard.