it depends on elevation of antenna as well, like Acer notebooks have their antenna built in to the top of screens, whilst many others just embed under the casing, so it effects.
btw, weather you get 20% signal or 100%, your internet speed will remain the same. as if u r on G 802.11g, means 54Mbps, obviously you wont be having inernet faster than 10Mbps. so shouldnt effect.
Intel Core2Quad 2.66Ghz 12MB L2-Cache
4096MB DDR Kingston Hyper-X
XFX 9600GT AlphaDog
Seagate 2 X 320GB SATA2
LG L246WH Flatron 24"