I don't think the results would have been as drastic if they used properly designed line icons, instead of just a fill-to-stroke version of the solid.
Exactly. What annoys me most about this is that the poll itself is heavily biased. Not exactly a good start for a discussion...
Is Apple's iOS 7 Update Killing You While You Sleep?
I thought no, but then I did the poll, and like nearly everyone else, found the solid easier except in the case of the chat bubble. Surprising.
I suspect it has something to do with the total number of lines, since all the others already had cutouts, etc.
I do not think it is a matter of understanding. I think they are just a bit harder to recognize at a glance.
Since switching to iOS 7 I have noticed that I have to take a second to look at the icon to know what it is. It has absolutely slowed me down some, which is a shame.
I'm in this boat as well. I understand what they mean, but it takes me longer to recognize them because there is less to look at. This is a matter of sacrificing usability for aesthetics.
I don't think so. There are so many complex things we get to see on a daily base and we manage to understand all these without any problems. So why would a tiny hollow icon require so much more cognitive energy?