Almost all JS ads have a render delay of ~1 s to avoid page layout issues. In this case they are using the same approach for HTML/JS ads on AMP pages, but if t

Almost all JS ads have a render delay of ~1 s to avoid page layout issues. In this case they are using the same approach for HTML/JS ads on AMP pages, but if they know it's AMP they don't need to. So I dunno - from an engineering point of view it seems pretty well justified to me.