Feasibility of WoWLAN & S5?

[espy <espy canonical com>]

We've recently fielded a query about whether or not it would be possible 
for NM (1.2.x) to support WoWLAN and S5.

Everything I've read about WoWLAN only mentions S3, although S4 does 
seem to be supported.

Any thoughts on S5 support?  It is possible given explicit driver and 
hardware support?  Does NM take down WiFi connections on shutdown 
similar to the suspend logic?

Regards,
/tony