I have a Galaxy S (GT-I9000) running Darky's ROM 10.1 (Gingerbread 2.3.3). I just noticed that when I use tethering to create a wireless AP, it uses only 802.11g, not 802.11n even though my netbook supports it. Not that I'd need it for the speed, but better signal for crowded places with lots of access points and all the g-channels used.
EDIT: g-channels, not frequencies