SPEED TESTS Local Speed Test (IE Only) This is the most accurate test. It downloads simple text to your machine. Netscape customers will not be able to use this test as Netscape has yet to support the VBScript code that is being used. Local Speed Test (Netscape and IE) Not as accurate as the above test as an image is parsed. Video card performance as well as other limiting factors can produce a lower result that what would normally be experienced.