This is a great article. I've heard very little about the negatives of this approach. Thanks, man!
I haven’t seen any other testing. Just wanted people to be aware of the pros and cons of the method.
Nice, I'm not a fan using PDF's, but exporting PNG's can be cumbersome, I've been using Iconfonts for a while, and it makes things pretty quick when adding new assets.
NSString * const IconName = @"\uf100";
Then use font with size to draw.
This is what we've been doing as well. It's awesome when you have icons changing color. However, scaling isn't ideal because they'll always maintain the same weight.
You can change color if you're using PNGs, too. iOS can tint images based on transparency easily.
I didn't even know you could do that.