hmm... I remember having this issue as well, but for my current network, none of the PC's have this issue (CEO has mac, but who cares about those?)
on the other hand, all our pc's are amd based, so, no intel chips either.

on the intel front found ppl saying about old drivers and then came across this:
http://www.velocityreviews.com/forums/t57644-wireless-connection-delay-in-windows-xp.html

in short, is your computer set to authenticate itself?
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