AMP sites have a 8 seconds-delayed CSS animation on the body element, turning visibility from hidden to visible. This animation is turned off instantly (as far

AMP sites have a 8 seconds-delayed CSS animation on the body element, turning visibility from hidden to visible. This animation is turned off instantly (as far as I can say) by Javascript. However when you block Javascript entirely or block ampproject.org you have to endure the whole 8 seconds. I inject "body {animation: none !important}" into all pages to remedy this.