As broadband services become more popular, the fear is that performance will reduce, as more users are jammed through pipes on the Internet side of the ISP that don’t grow as quickly (the Internet provision side is the expensive side for the ISP). If you’re concerned that you’re not getting the bandwidth you expected to get when you signed up for ADSL or your cable service or even dialup, here are couple of speed tests, the World of ADSL and ADSLGuide. If you do find it lower than you expected, contact your ISP, otherwise it will continue to get worse.