Empirically, users spend half a minute on average on the first page they visit on a website – six hundred times as much as 50 ms. Certainly, some times I see users reject a site in 10 seconds, if it’s truly bad, and sometimes it takes people a minute to decide whether leave or to click into the site. But in any case, we are talking multiple seconds. This is not very much time, and designers are well-advised to remember that users only have a few seconds to read the text and understand the navigation on their first visit. But people do multiple seconds to decide on how they feel about websites.