Huh? The summary is not specific at all (that's why it's a summary). Read it again. It says:
The next day, in 10-degree weather...
In fact, it's easier to look at Elon Musk's annotated version to see how it was misinterpreted:
http://www.teslamotors.com/sites/default/files/blog_images/a...
Notice how his red highlighted area encompasses the summary (which is in a different font-size) and the bullet-point-like annotations...yes, I guess if you read the infographic in that left-to-right fashion, you would make that connection...but if you read it in numerical order (as indicated by the numbered bullet points), you would not associate the two statements.