It depends on many factors such as how much resources it uses, the size of your files, the number of visitors, etc. If you have a basic WordPress blog with fewer plugins that don't consume too many resources then your website should load in under 1 second. But if you have a heavy WordPress blog with several plugins and it eats up so many resources and your server is not powerful enough to handle that many visitors, then it may take more than 5 seconds to load in some cases.