I dont touch my wireless for anything other than convenience for portable devices (iPod touch etc).
Cabled network is just so much mroe reliale for me. I get connection drops throughout the house on wireless.
Ah, this would explain my current problem, ocassionally (read every few bloody minutes) I get a split second packet drop (normally right about the moment I'm about to engage an enemy) which leads to the game momentarily freezing and the next moment me lying dead somewhere
i used to play wow on a wireless connection.
tried both a usb adapter and a pci card. Every so often (few mins) i get a lag spike of a few secs where the game would freeze. In the end i got too annoyed and went back to ethernet. this was about 2 years ago though so things may have changed. I would imagine its fine for rts though.
i used to i had to use http://vista-anti-lag.software.informer.com/ to get rid of the lag spikes i was getting with my wifi card .
you might not get one
Great piece of software, never had problems with my old laptops or on my old router, but with my desktop and new router this was a necessity to keep online games playable.
EDIT: believe the problem is the OS automatically refreshing/searching for any wireless signals, on XP you can disable it no luck on vista though.
Wireless gaming is fine, especially with RTS's.
If going wireless is the only option then get good quality stuff. Cheapo £10 crap is useless for gaming, get something of decent quality, no less than £20 cost of a well known quality brand (Belkin, Linksys etc.) The good quality stuff will easily rival wired, but will never surpass it in any aspect other than convenience.
Almost certainly down to Windows polling for wireless devices.
Try this guys, it should eliminate those brief periods of 100% pl: http://www.martin-majowski.de/wlanoptimizer/