My brand new XPS 15 frequently locks up when on a WiFi connection.  This isn't a full OS level lock-up as I an still hit ctrl-alt-del, but no other use input is registered; attached mouse, touchpad, other key presses (alt-tab & similar) are totally unrecognized.  I can touch the screen and see the touch response indicator, but nothing actually happens.

I suspect this is related to the other XPS Killer NIC issues; if I hit ctrl-alt-del and tap the WiFi status indicator on that screen to disable wifi, responsiveness returns almost immediately.

Was this Killer NIC issue resolved on other systems?  It's debilitating and makes my laptop virtually unusable.