I have a new Dell XPS 14 running Debian (Wheezy via Crunchbang). I've been experiencing periodic internet connectivity loss (roughly a couple minutes of downtime every 15 or so minutes, after which the system returns to normal) on wifi. This is experienced in interaction with my school's network (it's a big, serious system so it's both not something I can control and something that ought to be correctly configured). Some smaller networks have seemed to behave better, but that's a rough estimate.
I have tried changing the power management operation of my wifi card, as well as the ipV6 settings of the connection, but neither seem to help.
The chipset is an Atheros AR9462.