FORTUNE — Chances are, if you’re an iPhone or iPad owner, you’re more likely than not to be very satisfied with your device. But that may not be the case if you use Android.

Results out this week from ChangeWave Research show of the 4,061 people surveyed, 71% of iOS users reported to be “very satisfied” with Apple’s AAPL popular mobile software, while just 48% of Google GOOG Android users felt the same way. More surprising was how Windows Phone fared. For a mobile operating that has gotten some flack in the media for some initially sluggish sales—a situation that may be changing—more than half (53%) of actual Windows Phone users claim they’re happy with their choice, more so than their Android counterparts.

Trailing a distant fourth was RIM RIMM : just one-fourth, or 26%, of current BlackBerry owners are satisfied. The company will have the chance to fix that when BlackBerry 10 launches at the end of the month and compatible devices not long after. Whether it does so remains to be seen.

What do you think? Much of a surprise here?