Bridged Adapter & Wifi -Ubuntu 13.10 guest, Windows 7 host

[klcilwed93jjxgwo0]

I have windows 7 as the host and ubuntu 13.10 as a guest. When I connect by via a cable, then I can used the "Bridged Adapter" to allow internet access on the ubuntu guest. However when I use wifi, then this does not work (though I could make it work by using NAT). In the post "Bridged Adapter stopped working" on this forum (I cannot post link here because I dont have enough posts) noteirak mentions :

Wifi (wlan0) Bridging is never guaranteed to work, due to how the Wifi links are made. It will depends on your Wifi hardware (access point).
If ethernet works, but not wifi on the same network, then that's it I am afraid.

Why is Wifi Bridging never guaranteed to work? Thanks

[mpack]

Think about it. A WiFi slave makes simple one to one connections to a WiFi router. Ethernet OTOH is designed to cater for multidrop cables, switches etc - it's an inherently more flexible LAN arrangement. Sometimes you can spoof a WiFi adapter to behave more like a standard NIC, sometimes you can't. Them's the breaks.