8,387 were hybrids, of which 77 had struck a pedestrian — this works out to a 0.9 percent incidence rate

559,703 vehicles were traditional gas-burners, which struck 3,578 pedestrians, which works out to a 0.6 percent incidence rate

The article says "nearly twice as likely", which is not even really close at all. Also, the sample size is much smaller for the hybrids.

I understand that cars which are running on electricity are harder to hear coming. For the blind, I can see that as being troubling. That being said, I can hear a hybrid or a full electric fairly easily. I might have trouble hearing one coming if it were going over 20mph, since I'd have less time to react. The point is moot, though, since I actually look both ways when I'm crossing a street, like you are told when you're a child.