If MS think that the console has simply shifted seasonality then I doubt they'll rush to cut price. the 360 is seven years old and over last two years Kinect plus their marketing seems to have resulted in overall decent demand on an annual basis with a heavily skewed seasonal curve around Q4.
If MS are happy with that they're not going to cut price just to try and raise demand in other quarters vs their current annual performance.
At this point it seems neither HD console is going to suddenly streak away from the other, so it's hard to see what, apart from a few thousand more units a month and lower margin overall, MS would really stand to gain when you look at the bigger picture.
Try to be reasonable... its easier than you think...