Yeah I think it's s Microsoft issue as stated though
I tested this headset with my iphone just now and covered up the phone and what I think is a near field mic with a towel so the only mic option is the headset itself
Both skype and phone calls were crystal clear which had me breathing a big sigh of relief
Looks like it IS a ms Xbox controller firmware issue which is both frustrating and reassuring
I'm going to keep the Polks until this is fixed
But scaroooooo MS for releasing yet another buggy product without proper testing!!!