Looks like EE are blaming the delay of gdr2 on Microsoft now:
@EE: @KeefJudge been delayed. We're awaiting feedback from Microsoft on a new delivery date. Thanks!
http://twitter.com/EE/status/380274380678643712
The plot thickens.
After seeing this, i have decided to take the plunge. Will update via Navifirm after work... These delays/excuses are turning into a farce. Will probably flash the CV fw, and leave EE well alone!