'Progressive styling' is way more annoying (in my humble opinion) than waiting some time. Pages like the verge can take minutes anyway, when the wifi is not optimal. When you do things progressively, the page just keeps on changing, and the page can't really be used. So if you have a long page with text, and the user is somewhere halfway, the font loads and... BOOM! You are reading text that is located 8 paragraphs from where you were reading one instant ago.
This is far more annoying with images which dont specify their size, but I would still consider it bad practice to use an uncommon font for non-artistic pages.