Are slides how's etc the new Splash Pages?

[anndonnelly]

I just did SEO audits of approx 50 websites  in the tourism sector. Nearly all had poor Google Pagespeed ratings, partly down to that,  among other factors. I also feel that slideshows,, large images and videos in headers are poor for usability. I say get the content people need to engage with in front of them asap  Are there any stats or studies that can provide insight on this? I've been  telling those with these designs to  keep an eye on bounce rates and let that guide them