What did you upgrade your speed to the 10/1.5 and what county are you in?
I upgraded my internet to 3.0. I did so because my desktop PC was old (Windows 2000..installed over Win98) and was not pleased with the speed of downloads. Amazing how much quicker it really is. Subsequently I bought a new PC (Vista Home Edition Profesional).
After the upgrade I was also extremely pleased with the speed of my wireless connection (laptop). I'm in Crystal Lake (McHenry County).
