How fast a site shall open depends not just on the Internet connection of the visitor, but also on the connection of the hosting server where the site is hosted and on the network infrastructure - routers, server network card, etc. Slow connection or hardware that is unable to deal with a high volume of incoming and outgoing traffic could have strong influence on the user experience of your customers and the efficiency of your site because people shall probably see error messages that the website isn't available or it will take some time for your content material to load. In case such a thing takes place, it's unlikely that the site visitors will return to the website. For that reason you have to always confirm the connectivity of any hosting machine that you buy and not just the main hardware components which include hard disk, processor and physical memory.