Most iOS 7 users are "generally happy" with Apple's mobile operating system, with the Control Center being the favorite new feature by far.
Added photo filters and an improved Safari Web-browsing experience were also rated highly.
The research was done by UserTesting.com, which collected user feedback from a focus group of 102 existing Apple users, a week after iOS 7 was released.
"Most were generally happy with iOS 7 features with scores running above average," wrote Jennifer Moebius of UserTesting.com in an email. "However, Spotlight (internal search) and Multi-Tasking received the lowest scores of 73 percent and 75 percent respectively. The Control Center received the highest score of 96 percent."
An upward flick of the thumb brings up the Control Center, with quick access to key functions like Wi-Fi, Do Not Disturb, Bluetooth, music controls, as well as the camera, calculator and a new flashlight. The photo filters were the only other separate feature to get over 90 percent approval, while the new Safari got a respectable 87 percent.
Down the list, the improved Siri — Apple's voice-based assistant which now also searches Wikipedia and Twitter for information and answers — scored a somewhat mediocre 81 percent approval, while the overall design fell short of 80 percent approval.
Those participating in the UserTesting.com research were between the ages of 18 and 64; the gender breakdown was 54 males and 48 females.
Meanwhile, Chitika Insights, the research arm of online ad network Chitika, said in the first week of iOS 7's release, more than 51 percent of North American iOS-based Web traffic was generated by iOS 7 users, "again outpacing iOS 6 (adoption) over the same time period" last year.
"Largely continuing the trend seen last week, iOS 7 is outpacing iOS 6 in terms of share of North American iOS Web traffic by close to 5 percentage points," Andrew Waber of Chitika said in an email.
One issue that not mentioned in the UserTesting.com research was the motion-sickness factor that appears to be bothering some iOS 7 users. The software can produce the sensation of zooming in and out when a user switches between apps.
To help reduce some of the screen motion, go to Settings, then General, then Accessibility, where users can turn on "Reduce Motion."