The October, 2012 CR Reliability chart is attached as a PDF.
Meaningful? Meaningless? That's up to you.
They mention the Volt several times:
The General Motors nameplates—Buick, Cadillac, Chevrolet, and GMC—moved up in ranking. Cadillac climbed the farthest, but the best news might be from Chevrolet. The Volt extended-range electric car continues to have above-average reliability, and the compact Chevrolet Cruze, dismal in its first year, improved to average.
But despite the quotes above and the fact that the Volt has the highest rating of ANY vehicle in the CR survey of "Would you definitely buy this car again?"- 92% - it is still only middling on the CR Overall Ratings of small cars (behind the Leaf, Prius and VW Golf TDI).
When the Prius came to market 12 years ago, there was plenty of skepticism about how well hybrid powertrains would hold up. But those fears were unfounded: Reliability is a high point for most hybrids. All but the relatively new Hyundai Sonata Hybrid proved reliable in this year’s survey.
So far, electric vehicles have also been reliable. The Nissan Leaf had an excellent showing and was the most reliable Nissan in the lineup. The Chevrolet Volt has been above average in our past two surveys. And Toyota’s new Prius Plug-in earned a top reliability score in this year’s survey.
2017 Volt LT
Heather Gray Metallic; Light ash/Dark ash interior
Leather, Bose, Heated Seats/Mirrors, Lighted Charge Port
Driver now has even bigger smile...
2012 Chevy Volt #4471
(Returned to Ally 6/2015)
Cyber Gray Metallic
Back-Up Camera/Proximity Sensors
Driver has big smile on face most of the time