Yes it can, in case it has many images, videos from slow sites and more. In general there are a lot of factors that affect the speed, like:
- images tuned
- database tuning
- .htacces that may force the browser of the client to remembe for 1 month or more
- use of CDN or services like CloudFlare
- cache plugins
- invoke CSS, JS at the end of page
- page caching
- and more
