What can affect your broadband speed?

This does get a bit technical for the average person but we will try and make it easy to understand.

1. Depending on what service plan you have subscribed, that will affect the download and upload speed. With Izzinet, there is only one quoted maximum speed which is 1 Mbps.
2. The number of users sharing the basestation covering your area. The more people using that basestation, the more data they're trying to move, the slower it becomes. Think of it like a motorway - at 5am when the roads are empty, you can drive along at a good pace, but at 5pm when everyone wants to use the road - gridlock. The same happens with broadband.
3. The amount of traffic at a website and the amount of traffic with that ISP. The same slowing-down process happens at websites. If everyone tries to access one website at the same time, the webserver can't handle the demand and sometimes the website will not be accessible ('crash'). If you're surfing the web, some websites of the same size will load faster than others because they're not so busy.
4. Your computer setup. If you have an old computer and/or it's setup inefficiently this can slow things down e.g you only have a tiny amount of free memory and your computer is forced to use your hard disk to store temporary data which slows things down significantly.

This Q&A was found on iBurst 4 U : http://www.yburst.com/izzi/modules/smartfaq/faq.php?faqid=1