The broadband technology is not normally at fault where permanent connectivity is concerned, it's more to do with the service provider. Your best option is to do a little digging into the quality of service this service provider gives, i.e. customer discussion boards on the host's website etc.
Generally speaking, you will notice significant improvements in viewing anything on the net. You must bear in mind however, that transfer speeds are restricted by the slowest link in the connection. In other words, if you are one of many visitors to a site which has a small connection to the internet itself, then the transfer will be slow and there's nothing you can do apart from try again later. This said, the majority of broadband customers enjoy very good transfer rates for 90%+ of the time.