this trick DOES work! and I use it regularly!!

in Windows XP!

Open Dos prompt!

type ipconfig and then enter
it will show you your IP suppose 198.52.0.25
now type
ping 198.52.0.25 -t (never use CAPS)
it will show you some status in lines coming coming and coming!
keep with running and do you browsing!
you will feel your net speed is boosted!