I thought you were exaggerating, but holy cow... maybe those who disagree can find me a site from http://www.wix.com/explore/websites for which that doesn't hold true, because I gave up after a few which were all incredibly abysmal. Yeah, those sites are "stunning" alright. Aesthetically very bland and samey, but technically utterly stunning. I wouldn't even know how to make something that slow without using a combination of bmp images and sleeping here and there for a few seconds.
To be fair, I just tried a few of those sites and they're not as slow as the one I had in mind. But I wasn't exaggerating about that particular site. Each page view was taking at least 10 seconds to show the first pixel of content for what is effectively a static blog.
It looks like Wix only tested that Explore page in Chrome and Edge. Clicking any of the "View Site" links opens two new tabs in Firefox and Safari, opens nothing in IE11, but works as expected in Chrome and Edge.
