Help with identifying bottle neck

[bushmins]

I have a 10mb connection, my wired computer gets the correct speed test on this. Get about 10000 kbits/sec
http://homepage.ntlworld.com/robin.d.h.walker/speedtest.html

I have this laptop
http://uk.computers.toshiba-europe....oadvision.session.new=Yes&PRODUCT_ID=113319#0

wirless connection via this

http://www.linksysbycisco.com/UK/en/support/WRT54GS

When i use the speed tester on the laptop i get about 5801 kbits/sec


What is it that looses the 4000 kbits/sec?

 

[bushmins]

Its a very good signal. I was wondering if there are any limits on what the laptop could handle. If not i guess its the router max, but i cant find any info i understand.